diff --git a/trunk/paradiseo-peo/src/core/communicable.cpp b/trunk/paradiseo-peo/src/core/communicable.cpp
index 3caf6ee77..b6beca2ad 100644
--- a/trunk/paradiseo-peo/src/core/communicable.cpp
+++ b/trunk/paradiseo-peo/src/core/communicable.cpp
@@ -46,6 +46,7 @@ static std :: map <const Communicable *, unsigned> comm_to_key; /* Map of regist
 
 unsigned Communicable :: num_comm = 0;
 
+
 Communicable :: Communicable () {
 
   comm_to_key [this] = key = ++ num_comm;
@@ -70,7 +71,7 @@ Communicable * getCommunicable (COMM_ID __key) {
 }
 
 COMM_ID getKey (const Communicable * __comm) {
-  
+
   return comm_to_key [__comm];
 }
 
diff --git a/trunk/paradiseo-peo/src/core/communicable.h b/trunk/paradiseo-peo/src/core/communicable.h
index 7ec179d1a..4d0dae9f2 100644
--- a/trunk/paradiseo-peo/src/core/communicable.h
+++ b/trunk/paradiseo-peo/src/core/communicable.h
@@ -47,10 +47,10 @@ class Communicable {
 public :
 
   Communicable ();
-  
+
   virtual ~ Communicable ();
 
-  COMM_ID getKey ();  
+  COMM_ID getKey ();
 
   void lock (); /* It suspends the current process if the semaphore is locked */
   void unlock (); /* It unlocks the shared semaphore */
@@ -67,7 +67,7 @@ protected :
   COMM_ID key;
 
   sem_t sem_lock;
-  
+
   sem_t sem_stop;
 };
 
@@ -75,6 +75,4 @@ extern void initCommunicableEnv ();
 
 extern Communicable * getCommunicable (COMM_ID __key); 
 
-//extern COMM_ID getKey (const Communicable * __comm);
-
 #endif
diff --git a/trunk/paradiseo-peo/src/core/cooperative.h b/trunk/paradiseo-peo/src/core/cooperative.h
index 573c06805..efdcfebe4 100644
--- a/trunk/paradiseo-peo/src/core/cooperative.h
+++ b/trunk/paradiseo-peo/src/core/cooperative.h
@@ -51,7 +51,7 @@ public :
   void setOwner (Runner & __runner);
 
   virtual void pack () = 0;
-  
+
   virtual void unpack () = 0;
 
   void send (Cooperative * __coop); 
diff --git a/trunk/paradiseo-peo/src/core/eoVector_mesg.h b/trunk/paradiseo-peo/src/core/eoVector_mesg.h
index f5da8945e..ccf6fbf9c 100644
--- a/trunk/paradiseo-peo/src/core/eoVector_mesg.h
+++ b/trunk/paradiseo-peo/src/core/eoVector_mesg.h
@@ -44,7 +44,14 @@
 
 template <class F, class T> void pack (const eoVector <F, T> & __v) {
 
-  pack (__v.fitness ()) ;
+  if (__v.invalid()) {
+    pack((unsigned)0);
+  }
+  else {
+    pack((unsigned)1); 
+    pack (__v.fitness ());
+  }
+
   unsigned len = __v.size ();
   pack (len);
   for (unsigned i = 0 ; i < len; i ++)
@@ -53,9 +60,16 @@ template <class F, class T> void pack (const eoVector <F, T> & __v) {
 
 template <class F, class T> void unpack (eoVector <F, T> & __v) {
 
-  F fit; 
-  unpack (fit);
-  __v.fitness (fit);
+  unsigned valid; unpack(valid);
+
+  if (! valid) {
+    __v.invalidate();
+  }
+  else {
+    F fit; 
+    unpack (fit);
+    __v.fitness (fit);
+  }
 
   unsigned len;
   unpack (len);
diff --git a/trunk/paradiseo-peo/src/core/messaging.h b/trunk/paradiseo-peo/src/core/messaging.h
index 0a632fa05..a5d7246ed 100644
--- a/trunk/paradiseo-peo/src/core/messaging.h
+++ b/trunk/paradiseo-peo/src/core/messaging.h
@@ -71,13 +71,13 @@ extern void pack (const char * __str);
 
 /* Pointer */
 template <class T> void pack (const T * __ptr) {
-  
+
   pack ((unsigned long) __ptr); 
 }
 
 /* Pair */
 template <class U, class V> void pack (const std :: pair <U, V> & __pair) {
-  
+
   pack (__pair.first);
   pack (__pair.second);
 }
@@ -116,7 +116,7 @@ extern void unpack (char * __str);
 
 /* Pointer */
 template <class T> void unpack (T * & __ptr) {
-  
+
   unsigned long p;
   unpack (p);
   __ptr = (T *) p;
@@ -124,10 +124,9 @@ template <class T> void unpack (T * & __ptr) {
 
 /* Pair */
 template <class U, class V> void unpack (std :: pair <U, V> & __pair) {
-  
+
   unpack (__pair.first);
   unpack (__pair.second);
 }
 
-
 #endif
diff --git a/trunk/paradiseo-peo/src/core/peo_debug.cpp b/trunk/paradiseo-peo/src/core/peo_debug.cpp
index bd0d346ee..dc79f09fd 100644
--- a/trunk/paradiseo-peo/src/core/peo_debug.cpp
+++ b/trunk/paradiseo-peo/src/core/peo_debug.cpp
@@ -50,12 +50,14 @@
 
 #define DEBUG_PATH "./log/"
 
+
 static bool debug = true;
 
 static char host [MAX_BUFF_SIZE];
 
 std :: vector <FILE *> files;
 
+
 void setDebugMode (bool __dbg) {
 
   debug = __dbg;
@@ -65,7 +67,7 @@ void setDebugMode (bool __dbg) {
 extern int getNodeRank ();
 
 void initDebugging () {
-  
+
   mkdir (DEBUG_PATH, S_IRWXU);
   //  files.push_back (stdout);
   char buff [MAX_BUFF_SIZE];
diff --git a/trunk/paradiseo-peo/src/core/peo_fin.cpp b/trunk/paradiseo-peo/src/core/peo_fin.cpp
index c6b41cceb..8c0bf3ff4 100644
--- a/trunk/paradiseo-peo/src/core/peo_fin.cpp
+++ b/trunk/paradiseo-peo/src/core/peo_fin.cpp
@@ -44,7 +44,6 @@ void peo :: finalize () {
   printDebugMessage ("waiting for the termination of all threads");
 
   joinRunners ();
-
   finalizeRMC ();
 
   printDebugMessage ("this is the end");
diff --git a/trunk/paradiseo-peo/src/core/peo_init.cpp b/trunk/paradiseo-peo/src/core/peo_init.cpp
index f90f27476..31af40b19 100644
--- a/trunk/paradiseo-peo/src/core/peo_init.cpp
+++ b/trunk/paradiseo-peo/src/core/peo_init.cpp
@@ -38,11 +38,14 @@
 
 #include "peo_init.h"
 #include "peo_param.h"
+
 #include "peo_debug.h"
 #include "rmc.h"
+#include "runner.h"
 
 
 extern void initCommunicableEnv ();
+extern void initBuffers ();
 
 extern void initThreadsEnv ();
 extern void initReactiveThreadsEnv ();
@@ -50,10 +53,14 @@ extern void initReactiveThreadsEnv ();
 extern void initRunnersEnv ();
 extern void initWorkersEnv ();
 
+extern void initScheduler ();
+
 
 static void initExecutionEnv() {
 
   initCommunicableEnv ();
+  initBuffers ();
+  initScheduler();
 
   initThreadsEnv ();
   initReactiveThreadsEnv ();
@@ -62,27 +69,28 @@ static void initExecutionEnv() {
   initWorkersEnv ();
 }
 
+
 namespace peo {
 
   int * argc;
-  
+
   char * * * argv;
 
   void init (int & __argc, char * * & __argv) {
 
     argc = & __argc;
-    
+
     argv = & __argv;
 
     /* Initializing the execution environment */
     initExecutionEnv();
 
-    /* Initializing the the Resource Management and Communication */
-    initRMC (__argc, __argv);
-
     /* Loading the common parameters */ 
     loadParameters (__argc, __argv);
 
+    /* Initializing the the Resource Management and Communication */
+    initRMC ( *peo::argc, *peo::argv);
+
     /* */
     initDebugging ();
   }
diff --git a/trunk/paradiseo-peo/src/core/peo_init.h b/trunk/paradiseo-peo/src/core/peo_init.h
index b578cb501..9b4a90362 100644
--- a/trunk/paradiseo-peo/src/core/peo_init.h
+++ b/trunk/paradiseo-peo/src/core/peo_init.h
@@ -40,9 +40,9 @@
 namespace peo {
 
   extern int * argc;
-  
+
   extern char * * * argv;
-  
+
   extern void init (int & __argc, char * * & __argv);
 }
 
diff --git a/trunk/paradiseo-peo/src/core/peo_param.cpp b/trunk/paradiseo-peo/src/core/peo_param.cpp
index a6023430e..6e3f4b6e5 100644
--- a/trunk/paradiseo-peo/src/core/peo_param.cpp
+++ b/trunk/paradiseo-peo/src/core/peo_param.cpp
@@ -40,7 +40,6 @@
 #include "peo_debug.h"
 
 
-
 void peo :: loadParameters (int & __argc, char * * & __argv) {
 
   eoParser parser (__argc, __argv);
diff --git a/trunk/paradiseo-peo/src/core/peo_param.h b/trunk/paradiseo-peo/src/core/peo_param.h
index fd00bfc28..4ec838e0b 100644
--- a/trunk/paradiseo-peo/src/core/peo_param.h
+++ b/trunk/paradiseo-peo/src/core/peo_param.h
@@ -38,7 +38,7 @@
 #define __peo_param_h
 
 namespace peo {
-  
+
   extern void loadParameters (int & __argc, char * * & __argv);
 }
 
diff --git a/trunk/paradiseo-peo/src/core/peo_run.cpp b/trunk/paradiseo-peo/src/core/peo_run.cpp
index ceb01da6f..166a45a44 100644
--- a/trunk/paradiseo-peo/src/core/peo_run.cpp
+++ b/trunk/paradiseo-peo/src/core/peo_run.cpp
@@ -34,11 +34,11 @@
 *
 */
 
-#include "peo_init.h"
 #include "peo_run.h"
 #include "rmc.h"
 #include "runner.h"
 
+
 void peo :: run () {
 
   startRunners ();
diff --git a/trunk/paradiseo-peo/src/core/peo_run.h b/trunk/paradiseo-peo/src/core/peo_run.h
index e4bcc55c6..b5ca43365 100644
--- a/trunk/paradiseo-peo/src/core/peo_run.h
+++ b/trunk/paradiseo-peo/src/core/peo_run.h
@@ -38,7 +38,7 @@
 #define __peo_run_h
 
 namespace peo {
-  
+
   extern void run ();
 }
 
diff --git a/trunk/paradiseo-peo/src/core/reac_thread.cpp b/trunk/paradiseo-peo/src/core/reac_thread.cpp
index ca341e475..bd669948f 100644
--- a/trunk/paradiseo-peo/src/core/reac_thread.cpp
+++ b/trunk/paradiseo-peo/src/core/reac_thread.cpp
@@ -40,6 +40,7 @@ static bool the_end = false;
 
 static std :: vector <ReactiveThread *> reac_threads;
 
+
 ReactiveThread :: ReactiveThread () {
 
   reac_threads.push_back (this);
diff --git a/trunk/paradiseo-peo/src/core/reac_thread.h b/trunk/paradiseo-peo/src/core/reac_thread.h
index 91dad6221..79619090a 100644
--- a/trunk/paradiseo-peo/src/core/reac_thread.h
+++ b/trunk/paradiseo-peo/src/core/reac_thread.h
@@ -43,14 +43,14 @@
 
 
 class ReactiveThread : public Thread {
-	
+
 public:
 
   /* Ctor */
   ReactiveThread ();
 
   void sleep ();
-  
+
   void wakeUp ();
 
 private:
@@ -62,6 +62,4 @@ extern void initReactiveThreadsEnv ();
 
 extern void stopReactiveThreads ();
 
-extern bool theEnd ();
-
 #endif /*REAC_THREAD_H_*/
diff --git a/trunk/paradiseo-peo/src/core/ring_topo.cpp b/trunk/paradiseo-peo/src/core/ring_topo.cpp
index 5dbf9933d..c52ebb454 100644
--- a/trunk/paradiseo-peo/src/core/ring_topo.cpp
+++ b/trunk/paradiseo-peo/src/core/ring_topo.cpp
@@ -43,7 +43,7 @@ void RingTopology :: setNeighbors (Cooperative * __mig,
   __to.clear () ;
 
     int len = mig.size () ;
-    
+
     for (int i = 0 ; i < len ; i ++)      
       if (mig [i] == __mig) {	
 	__from.push_back (mig [(i - 1 + len) % len]) ;
diff --git a/trunk/paradiseo-peo/src/core/ring_topo.h b/trunk/paradiseo-peo/src/core/ring_topo.h
index 40d7405c6..363a69850 100644
--- a/trunk/paradiseo-peo/src/core/ring_topo.h
+++ b/trunk/paradiseo-peo/src/core/ring_topo.h
@@ -40,9 +40,9 @@
 #include "topology.h"
 
 class RingTopology : public Topology {
-  
+
 public :
-   
+
   void setNeighbors (Cooperative * __mig,
 		     std :: vector <Cooperative *> & __from,
 		     std :: vector <Cooperative *> & __to);
diff --git a/trunk/paradiseo-peo/src/core/runner.cpp b/trunk/paradiseo-peo/src/core/runner.cpp
index 199ae5a2a..624dd8578 100644
--- a/trunk/paradiseo-peo/src/core/runner.cpp
+++ b/trunk/paradiseo-peo/src/core/runner.cpp
@@ -95,50 +95,19 @@ Runner * getRunner (RUNNER_ID __key) {
   return dynamic_cast <Runner *> (getCommunicable (__key));
 }
 
-void packExecutionContext () {
-
-  num_local_exec_runners = 0;
-  for (unsigned i = 0; i < the_runners.size (); i ++)
-    if (the_runners [i] -> isAssignedLocally ()) num_local_exec_runners ++;
-  pack(num_local_exec_runners);
-}
-
-void unpackExecutionContext () {
-
-  unsigned num_remote_runners;
-  unpack(num_remote_runners);
-  num_exec_runners += num_remote_runners;
-}
-
 void initializeContext () {
 
-  initMessage ();
-  packExecutionContext ();
-  sendMessageToAll (EXECUTION_CONTEXT_TAG);
+  num_local_exec_runners = 0;
 
-  int src, tag;
-  for (unsigned i = 0; i < getNumberOfNodes(); i ++) {
-
-    cleanBuffers ();
-    waitMessage ();
-
-    probeMessage ( src, tag );
-    receiveMessage( src, tag );
-
-    initMessage ();
-    unpackExecutionContext ();
+  // setting up the execution IDs & counting the number of local exec. runners
+  for (unsigned i = 0; i < the_runners.size (); i ++) {
+    the_runners [i] -> setExecutionID ( my_node -> execution_id_run[ i ] );
+    if (the_runners [i] -> isAssignedLocally ()) num_local_exec_runners ++;
   }
 
-  cleanBuffers ();
+  collectiveCountOfRunners( &num_local_exec_runners, &num_exec_runners );
 
-  // setting up the execution IDs
-  for (unsigned i = 0; i < the_runners.size (); i ++)
-    the_runners [i] -> setExecutionID ( my_node -> execution_id_run[ i ] );
-
-
-  // synchronizing - all the nodes have to finish initializing
-  // the context before actually executing the runners
-  synchronizeNodes ();
+  // synchronizeNodes ();
 
   for (unsigned i = 0; i < the_runners.size (); i ++)
     if (the_runners [i] -> isAssignedLocally ()) the_runners [i] -> notifyContextInitialized ();
@@ -217,6 +186,7 @@ void unpackTerminationOfRunner () {
 
     printDebugMessage ("All the runners have terminated - now stopping the reactive threads.");
     stopReactiveThreads ();
+    printDebugMessage ("Reactive threads stopped!");
   }
 }
 
diff --git a/trunk/paradiseo-peo/src/core/service.cpp b/trunk/paradiseo-peo/src/core/service.cpp
index 8bf981af0..322769fe5 100644
--- a/trunk/paradiseo-peo/src/core/service.cpp
+++ b/trunk/paradiseo-peo/src/core/service.cpp
@@ -40,7 +40,7 @@ void Service :: setOwner (Thread & __owner) {
 
   owner = & __owner;
 }
-  
+
 Thread * Service :: getOwner () {
 
   return owner;
diff --git a/trunk/paradiseo-peo/src/core/service.h b/trunk/paradiseo-peo/src/core/service.h
index fda8daf78..3e48ebd80 100644
--- a/trunk/paradiseo-peo/src/core/service.h
+++ b/trunk/paradiseo-peo/src/core/service.h
@@ -48,7 +48,7 @@ class Service : public Communicable {
 public :
 
   void setOwner (Thread & __owner);
-  
+
   Thread * getOwner (); 
 
   void requestResourceRequest (unsigned __how_many = 1);
@@ -58,7 +58,7 @@ public :
   virtual void unpackData ();
 
   virtual void execute ();
-  
+
   virtual void packResult ();
   virtual void unpackResult ();
 
diff --git a/trunk/paradiseo-peo/src/core/thread.cpp b/trunk/paradiseo-peo/src/core/thread.cpp
index e1fa309c8..0c7ba956b 100644
--- a/trunk/paradiseo-peo/src/core/thread.cpp
+++ b/trunk/paradiseo-peo/src/core/thread.cpp
@@ -42,8 +42,9 @@ static std :: vector <Thread *> threads;
 
 unsigned num_act = 0;
 
+
 Thread :: Thread () {
-	
+
   threads.push_back (this);
   act = false;
 }
@@ -53,8 +54,6 @@ Thread :: ~ Thread () {
   /* Nothing ! */
 }
 
-extern int getNodeRank ();
-
 void Thread :: setActive () {
 
   if (! act) {
@@ -70,7 +69,7 @@ void Thread :: setPassive () {
 
     act = false;
     num_act --;
-  } 
+  }
 }
 
 void initThreadsEnv () {
diff --git a/trunk/paradiseo-peo/src/core/thread.h b/trunk/paradiseo-peo/src/core/thread.h
index 4f4925c3d..42b1c0edb 100644
--- a/trunk/paradiseo-peo/src/core/thread.h
+++ b/trunk/paradiseo-peo/src/core/thread.h
@@ -42,7 +42,7 @@
 
 /* A high-level thread */
 class Thread {
-	
+
 public:
 
   /* Ctor */
@@ -50,7 +50,7 @@ public:
 
   /* Dtor */
   virtual ~ Thread ();
-  
+
   /* Go ! */
   virtual void start () = 0;
 
@@ -59,7 +59,7 @@ public:
 			(but it may receive messages) */
 
 private :
-  
+
   bool act;
 };
 
diff --git a/trunk/paradiseo-peo/src/core/topology.cpp b/trunk/paradiseo-peo/src/core/topology.cpp
index 4a685b406..6e6ed0779 100644
--- a/trunk/paradiseo-peo/src/core/topology.cpp
+++ b/trunk/paradiseo-peo/src/core/topology.cpp
@@ -37,12 +37,11 @@
 #include "topology.h"
 
 Topology :: ~ Topology () {
-  
+
   /* Nothing ! */
 }
 
 void Topology :: add (Cooperative & __mig) {
-  
-  mig.push_back (& __mig) ;
-} 
 
+  mig.push_back (& __mig) ;
+}
diff --git a/trunk/paradiseo-peo/src/peoEA.h b/trunk/paradiseo-peo/src/peoEA.h
index a059d56a0..c2604d1ce 100644
--- a/trunk/paradiseo-peo/src/peoEA.h
+++ b/trunk/paradiseo-peo/src/peoEA.h
@@ -80,48 +80,48 @@
 //!	<tr><td>... &nbsp;</td> <td> &nbsp; </td></tr>
 //!	</table>
 template < class EOT > class peoEA : public Runner
-  {
+{
 
-  public:
+public:
 
-    //! Constructor for the evolutionary algorithm object - several basic parameters have to be specified,
-    //! allowing for different levels of parallelism. Depending on the requirements, a sequential or a parallel
-    //! evaluation operator may be specified or, in the same manner, a sequential or a parallel transformation
-    //! operator may be given as parameter. Out of the box objects may be provided, from the EO package, for example,
-    //! or custom defined ones may be specified, provided that they are derived from the correct base classes.
-    //!
-    //! @param eoContinue< EOT >& __cont - continuation criterion specifying whether the algorithm should continue or not;
-    //! @param peoPopEval< EOT >& __pop_eval - evaluation operator; it allows the specification of parallel evaluation operators, aggregate evaluation functions, etc.;
-    //! @param eoSelect< EOT >& __select - selection strategy to be applied for constructing a list of offspring individuals;
-    //! @param peoTransform< EOT >& __trans - transformation operator, i.e. crossover and mutation; allows for sequential or parallel transform;
-    //! @param eoReplacement< EOT >& __replace - replacement strategy for integrating the offspring individuals in the initial population;
-    peoEA(
-      eoContinue< EOT >& __cont,
-      peoPopEval< EOT >& __pop_eval,
-      eoSelect< EOT >& __select,
-      peoTransform< EOT >& __trans,
-      eoReplacement< EOT >& __replace
-    );
+  //! Constructor for the evolutionary algorithm object - several basic parameters have to be specified,
+  //! allowing for different levels of parallelism. Depending on the requirements, a sequential or a parallel
+  //! evaluation operator may be specified or, in the same manner, a sequential or a parallel transformation
+  //! operator may be given as parameter. Out of the box objects may be provided, from the EO package, for example,
+  //! or custom defined ones may be specified, provided that they are derived from the correct base classes.
+  //!
+  //! @param eoContinue< EOT >& __cont - continuation criterion specifying whether the algorithm should continue or not;
+  //! @param peoPopEval< EOT >& __pop_eval - evaluation operator; it allows the specification of parallel evaluation operators, aggregate evaluation functions, etc.;
+  //! @param eoSelect< EOT >& __select - selection strategy to be applied for constructing a list of offspring individuals;
+  //! @param peoTransform< EOT >& __trans - transformation operator, i.e. crossover and mutation; allows for sequential or parallel transform;
+  //! @param eoReplacement< EOT >& __replace - replacement strategy for integrating the offspring individuals in the initial population;
+  peoEA(
+    eoContinue< EOT >& __cont,
+    peoPopEval< EOT >& __pop_eval,
+    eoSelect< EOT >& __select,
+    peoTransform< EOT >& __trans,
+    eoReplacement< EOT >& __replace
+  );
 
-    //! Evolutionary algorithm function - a side effect of the fact that the class is derived from the <b>Runner</b> class,
-    //! thus requiring the existence of a <i>run</i> function, the algorithm being executed on a distinct thread.
-    void run();
+  //! Evolutionary algorithm function - a side effect of the fact that the class is derived from the <b>Runner</b> class,
+  //! thus requiring the existence of a <i>run</i> function, the algorithm being executed on a distinct thread.
+  void run();
 
-    //! Function operator for specifying the population to be associated with the algorithm.
-    //!
-    //! @param eoPop< EOT >& __pop - initial population of the algorithm, to be iteratively evolved;
-    void operator()( eoPop< EOT >& __pop );
-
-  private:
+  //! Function operator for specifying the population to be associated with the algorithm.
+  //!
+  //! @param eoPop< EOT >& __pop - initial population of the algorithm, to be iteratively evolved;
+  void operator()( eoPop< EOT >& __pop );
 
 
-    eoContinue< EOT >& cont;
-    peoPopEval< EOT >& pop_eval;
-    eoSelect< EOT >& select;
-    peoTransform< EOT >& trans;
-    eoReplacement< EOT >& replace;
-    eoPop< EOT >* pop;
-  };
+private:
+
+  eoContinue< EOT >& cont;
+  peoPopEval< EOT >& pop_eval;
+  eoSelect< EOT >& select;
+  peoTransform< EOT >& trans;
+  eoReplacement< EOT >& replace;
+  eoPop< EOT >* pop;
+};
 
 
 template < class EOT > peoEA< EOT > :: peoEA(
@@ -150,30 +150,29 @@ template< class EOT > void peoEA< EOT > :: operator ()( eoPop< EOT >& __pop )
 template< class EOT > void peoEA< EOT > :: run()
 {
 
-  printDebugMessage( "performing the first evaluation of the population." );
+  printDebugMessage( "peoEA: performing the first evaluation of the population." );
   pop_eval( *pop );
 
   do
-    {
+  {
 
-      eoPop< EOT > off;
+    eoPop< EOT > off;
 
-      printDebugMessage( "performing the selection step." );
-      select( *pop, off );
-      trans( off );
+    printDebugMessage( "peoEA: performing the selection step." );
+    select( *pop, off );
+    trans( off );
 
-      printDebugMessage( "performing the evaluation of the population." );
+    printDebugMessage( "peoEA: performing the evaluation of the population." );
 
-      pop_eval( off );
+    pop_eval( off );
 
-      printDebugMessage( "performing the replacement of the population." );
-      replace( *pop, off );
+    printDebugMessage( "peoEA: performing the replacement of the population." );
+    replace( *pop, off );
 
-      printDebugMessage( "deciding of the continuation." );
+    printDebugMessage( "peoEA: deciding of the continuation." );
 
-    }
+  }
   while ( cont( *pop ) );
 }
 
-
 #endif
diff --git a/trunk/paradiseo-peo/src/peoEvalFunc.h b/trunk/paradiseo-peo/src/peoEvalFunc.h
index b6e8486f3..b19e27335 100644
--- a/trunk/paradiseo-peo/src/peoEvalFunc.h
+++ b/trunk/paradiseo-peo/src/peoEvalFunc.h
@@ -43,20 +43,20 @@ template< class EOT, class FitT = EOT::Fitness, class FunctionArg = const EOT& >
 template< class EOT, class FitT = typename EOT::Fitness, class FunctionArg = const EOT& >
 #endif
 struct peoEvalFunc: public eoEvalFunc<EOT>
+{
+
+  peoEvalFunc( FitT (* _eval)( FunctionArg ) )
+      : eoEvalFunc<EOT>(), evalFunc( _eval )
+  {};
+
+  virtual void operator() ( EOT & _peo )
   {
-
-    peoEvalFunc( FitT (* _eval)( FunctionArg ) )
-        : eoEvalFunc<EOT>(), evalFunc( _eval )
-    {};
-
-    virtual void operator() ( EOT & _peo )
-    {
-      _peo.fitness((*evalFunc)( _peo ));
-    };
+    _peo.fitness((*evalFunc)( _peo ));
+  };
 
 private:
-    FitT (* evalFunc )( FunctionArg );
-  };
+  FitT (* evalFunc )( FunctionArg );
+};
 
 #endif
 
diff --git a/trunk/paradiseo-peo/src/peoNoAggEvalFunc.h b/trunk/paradiseo-peo/src/peoNoAggEvalFunc.h
index d6fa02152..3e169341e 100644
--- a/trunk/paradiseo-peo/src/peoNoAggEvalFunc.h
+++ b/trunk/paradiseo-peo/src/peoNoAggEvalFunc.h
@@ -45,13 +45,13 @@
 //! The class is provided as a mean of declaring that no aggregation is required for the evaluation function - the fitness
 //! value is explicitly specified.
 template< class EOT > class peoNoAggEvalFunc : public peoAggEvalFunc< EOT >
-  {
+{
 
-  public :
+public :
 
-    //! Operator which sets as fitness the <b>__fit</b> value for the <b>__sol</b> individual
-    void operator()( EOT& __sol, const typename EOT :: Fitness& __fit );
-  };
+  //! Operator which sets as fitness the <b>__fit</b> value for the <b>__sol</b> individual
+  void operator()( EOT& __sol, const typename EOT :: Fitness& __fit );
+};
 
 
 template< class EOT > void peoNoAggEvalFunc< EOT > :: operator()( EOT& __sol, const typename EOT :: Fitness& __fit )
diff --git a/trunk/paradiseo-peo/src/peoParaSGATransform.h b/trunk/paradiseo-peo/src/peoParaSGATransform.h
index 08f6bb1cb..38cb7a62a 100644
--- a/trunk/paradiseo-peo/src/peoParaSGATransform.h
+++ b/trunk/paradiseo-peo/src/peoParaSGATransform.h
@@ -47,54 +47,54 @@ extern int getNodeRank();
 
 
 template< class EOT > class peoParaSGATransform : public peoTransform< EOT >
-  {
+{
 
-  public:
+public:
 
-    using peoTransform< EOT > :: requestResourceRequest;
-    using peoTransform< EOT > :: resume;
-    using peoTransform< EOT > :: stop;
-    using peoTransform< EOT > :: getOwner;
+  using peoTransform< EOT > :: requestResourceRequest;
+  using peoTransform< EOT > :: resume;
+  using peoTransform< EOT > :: stop;
+  using peoTransform< EOT > :: getOwner;
 
-    peoParaSGATransform(
+  peoParaSGATransform(
 
-      eoQuadOp< EOT >& __cross,
-      double __cross_rate,
-      eoMonOp< EOT >& __mut,
-      double __mut_rate
-    );
+    eoQuadOp< EOT >& __cross,
+    double __cross_rate,
+    eoMonOp< EOT >& __mut,
+    double __mut_rate
+  );
 
-    void operator()( eoPop< EOT >& __pop );
+  void operator()( eoPop< EOT >& __pop );
 
-    void packData();
+  void packData();
 
-    void unpackData();
+  void unpackData();
 
-    void execute();
+  void execute();
 
-    void packResult();
+  void packResult();
 
-    void unpackResult();
+  void unpackResult();
 
-    void notifySendingData();
-    void notifySendingAllResourceRequests();
+  void notifySendingData();
+  void notifySendingAllResourceRequests();
 
-  private:
+private:
 
-    eoQuadOp< EOT >& cross;
-    double cross_rate;
+  eoQuadOp< EOT >& cross;
+  double cross_rate;
 
-    eoMonOp< EOT >& mut;
-    double mut_rate;
+  eoMonOp< EOT >& mut;
+  double mut_rate;
 
-    unsigned idx;
+  unsigned idx;
 
-    eoPop< EOT >* pop;
+  eoPop< EOT >* pop;
 
-    EOT father, mother;
+  EOT father, mother;
 
-    unsigned num_term;
-  };
+  unsigned num_term;
+};
 
 template< class EOT > peoParaSGATransform< EOT > :: peoParaSGATransform(
 
@@ -156,18 +156,18 @@ template< class EOT > void peoParaSGATransform< EOT > :: unpackResult()
 
   // Can be used with an odd size
   if ( num_term == 2*(pop->size()/2) )
-    {
+  {
 
-      getOwner()->setActive();
-      resume();
-    }
+    getOwner()->setActive();
+    resume();
+  }
 }
 
 
 template< class EOT > void peoParaSGATransform< EOT > :: operator()( eoPop < EOT >& __pop )
 {
 
-  printDebugMessage( "performing the parallel transformation step." );
+  printDebugMessage( "peoParaSGATransform: performing the parallel transformation step." );
   pop = &__pop;
   idx = 0;
   num_term = 0;
diff --git a/trunk/paradiseo-peo/src/peoParallelAlgorithmWrapper.h b/trunk/paradiseo-peo/src/peoParallelAlgorithmWrapper.h
index 192bc282f..c27b66844 100644
--- a/trunk/paradiseo-peo/src/peoParallelAlgorithmWrapper.h
+++ b/trunk/paradiseo-peo/src/peoParallelAlgorithmWrapper.h
@@ -67,7 +67,7 @@ class peoParallelAlgorithmWrapper : public Runner
 
   ~peoParallelAlgorithmWrapper()
     {
-      
+
       delete algorithm;
     }
 
@@ -76,12 +76,12 @@ class peoParallelAlgorithmWrapper : public Runner
     algorithm->operator()();
   }
 
-  
+
  private:
 
   struct AbstractAlgorithm
   {
-	
+
     // virtual destructor as we will be using inheritance and polymorphism
     virtual ~AbstractAlgorithm()
     { }
@@ -90,7 +90,7 @@ class peoParallelAlgorithmWrapper : public Runner
     virtual void operator()()
     { }
   };
-  
+
   template< typename AlgorithmType, typename AlgorithmDataType > struct Algorithm : public AbstractAlgorithm
   {
 
@@ -117,7 +117,7 @@ class peoParallelAlgorithmWrapper : public Runner
     {
       algorithm();
     }
-    
+
     AlgorithmType& algorithm;
   };
 
@@ -127,7 +127,7 @@ class peoParallelAlgorithmWrapper : public Runner
   FunctionAlgorithm( AlgorithmReturnType (*externalAlgorithm)( AlgorithmDataType& ), AlgorithmDataType& externalData )
     : algorithm( externalAlgorithm ), algorithmData( externalData )
     {}
-    
+
     virtual void operator()()
     {
       algorithm( algorithmData );
@@ -136,22 +136,22 @@ class peoParallelAlgorithmWrapper : public Runner
     AlgorithmReturnType (*algorithm)( AlgorithmDataType& );
     AlgorithmDataType& algorithmData;
   };
-  
+
   template< typename AlgorithmReturnType > struct FunctionAlgorithm< AlgorithmReturnType, void > : public AbstractAlgorithm
   {
 
   FunctionAlgorithm( AlgorithmReturnType (*externalAlgorithm)() )
     : algorithm( externalAlgorithm )
     {}
-    
+
     virtual void operator()()
     {
       algorithm();
     }
-    
+
     AlgorithmReturnType (*algorithm)();
   };
-  
+
  private:
 
   AbstractAlgorithm* algorithm;
diff --git a/trunk/paradiseo-peo/src/peoPopEval.h b/trunk/paradiseo-peo/src/peoPopEval.h
index ed3f7087a..e25c846d9 100644
--- a/trunk/paradiseo-peo/src/peoPopEval.h
+++ b/trunk/paradiseo-peo/src/peoPopEval.h
@@ -45,13 +45,12 @@
 //! The derived classes may be used as wrappers for <b>EO</b>-derived evaluation functors. In order to have an example,
 //! please refer to the implementation of the <b>peoSeqPopEval</b> and <b>peoParaPopEval</b> classes.
 template< class EOT > class peoPopEval : public Service
-  {
+{
 
-  public:
-
-    //! Interface function providing the signature for constructing an evaluation functor.
-    virtual void operator()( eoPop< EOT >& __pop ) = 0;
-  };
+public:
 
+  //! Interface function providing the signature for constructing an evaluation functor.
+  virtual void operator()( eoPop< EOT >& __pop ) = 0;
+};
 
 #endif
diff --git a/trunk/paradiseo-peo/src/peoSyncIslandMig.h b/trunk/paradiseo-peo/src/peoSyncIslandMig.h
index 71abae0e3..6cce0c2a5 100644
--- a/trunk/paradiseo-peo/src/peoSyncIslandMig.h
+++ b/trunk/paradiseo-peo/src/peoSyncIslandMig.h
@@ -144,68 +144,68 @@
 //! the associated distinctly parametrized migration objects. The interconnecting element is the underlying topology, defined at step 1
 //! (the same C++ migTopology object has to be passed as parameter for all the migration objects, in order to interconnect them).
 template< class EOT > class peoSyncIslandMig : public Cooperative, public eoUpdater
-  {
+{
 
-  public:
+public:
 
-    //! Constructor for the peoSyncIslandMig class; the characteristics of the migration model are defined
-    //! through the specified parameters - out of the box objects provided in EO, etc., or custom, derived objects may be passed as parameters.
-    //!
-    //! @param unsigned __frequency - frequency of the migrations - the migrations occur periodically;
-    //! @param eoSelect< EOT >& __select - selection strategy to be applied for constructing a list of emigrant individuals out of the source population;
-    //! @param eoReplacement< EOT >& __replace - replacement strategy used for integrating the immigrant individuals in the destination population;
-    //! @param Topology& __topology - topological model to be followed when performing migrations;
-    //! @param eoPop< EOT >& __source - source population from which the emigrant individuals are selected;
-    //! @param eoPop< EOT >& __destination - destination population in which the immigrant population are integrated.
-    peoSyncIslandMig(
-      unsigned __frequency,
-      eoSelect< EOT >& __select,
-      eoReplacement< EOT >& __replace,
-      Topology& __topology,
-      eoPop< EOT >& __source,
-      eoPop< EOT >& __destination
-    );
+  //! Constructor for the peoSyncIslandMig class; the characteristics of the migration model are defined
+  //! through the specified parameters - out of the box objects provided in EO, etc., or custom, derived objects may be passed as parameters.
+  //!
+  //! @param unsigned __frequency - frequency of the migrations - the migrations occur periodically;
+  //! @param eoSelect< EOT >& __select - selection strategy to be applied for constructing a list of emigrant individuals out of the source population;
+  //! @param eoReplacement< EOT >& __replace - replacement strategy used for integrating the immigrant individuals in the destination population;
+  //! @param Topology& __topology - topological model to be followed when performing migrations;
+  //! @param eoPop< EOT >& __source - source population from which the emigrant individuals are selected;
+  //! @param eoPop< EOT >& __destination - destination population in which the immigrant population are integrated.
+  peoSyncIslandMig(
+    unsigned __frequency,
+    eoSelect< EOT >& __select,
+    eoReplacement< EOT >& __replace,
+    Topology& __topology,
+    eoPop< EOT >& __source,
+    eoPop< EOT >& __destination
+  );
 
-    //! Function operator to be called as checkpoint for performing the migration step. The emigrant individuals are selected
-    //! from the source population and sent to the next island (defined by the topology object) while the immigrant
-    //! individuals are integrated in the destination population. There is no need to explicitly call the function - the
-    //! wrapper checkpoint object (please refer to the above example) will perform the call when required.
-    void operator()();
+  //! Function operator to be called as checkpoint for performing the migration step. The emigrant individuals are selected
+  //! from the source population and sent to the next island (defined by the topology object) while the immigrant
+  //! individuals are integrated in the destination population. There is no need to explicitly call the function - the
+  //! wrapper checkpoint object (please refer to the above example) will perform the call when required.
+  void operator()();
 
-    //! Auxiliary function dealing with sending the emigrant individuals. There is no need to explicitly call the function.
-    void pack();
-    //! Auxiliary function dealing with receiving immigrant individuals. There is no need to explicitly call the function.
-    void unpack();
+  //! Auxiliary function dealing with sending the emigrant individuals. There is no need to explicitly call the function.
+  void pack();
+  //! Auxiliary function dealing with receiving immigrant individuals. There is no need to explicitly call the function.
+  void unpack();
 
-    //! Auxiliary function dealing with migration notifications. There is no need to explicitly call the function.
-    void notifySending();
+  //! Auxiliary function dealing with migration notifications. There is no need to explicitly call the function.
+  void notifySending();
 
 
-  private:
+private:
 
-    void emigrate();
-    void immigrate();
+  void emigrate();
+  void immigrate();
 
 
-  private:
+private:
 
-    eoPeriodicContinue< EOT > cont;
-    eoSelect< EOT >& select; 	// selection strategy
-    eoReplacement< EOT >& replace;	// replacement strategy
-    Topology& topology; 		// neighboring topology
+  eoPeriodicContinue< EOT > cont;
+  eoSelect< EOT >& select; 		// selection strategy
+  eoReplacement< EOT >& replace;	// replacement strategy
+  Topology& topology; 			// neighboring topology
 
-    // source and target populations
-    eoPop< EOT >& source;
-    eoPop< EOT >& destination;
+  // source and target populations
+  eoPop< EOT >& source;
+  eoPop< EOT >& destination;
 
-    // immigrants & emigrants in the queue
-    std :: queue< eoPop< EOT > > imm;
-    std :: queue< eoPop< EOT > > em;
+  // immigrants & emigrants in the queue
+  std :: queue< eoPop< EOT > > imm;
+  std :: queue< eoPop< EOT > > em;
 
-    std :: queue< Cooperative* > coop_em;
+  std :: queue< Cooperative* > coop_em;
 
-    sem_t sync;
-  };
+  sem_t sync;
+};
 
 
 template< class EOT > peoSyncIslandMig< EOT > :: peoSyncIslandMig(
@@ -261,15 +261,15 @@ template< class EOT > void peoSyncIslandMig< EOT > :: emigrate()
   topology.setNeighbors( this, in, out );
 
   for ( unsigned i = 0; i < out.size(); i ++ )
-    {
+  {
 
-      eoPop< EOT > mig;
-      select( source, mig );
-      em.push( mig );
-      coop_em.push( out[ i ] );
-      send( out[ i ] );
-      printDebugMessage( "sending some emigrants." );
-    }
+    eoPop< EOT > mig;
+    select( source, mig );
+    em.push( mig );
+    coop_em.push( out[ i ] );
+    send( out[ i ] );
+    printDebugMessage( "peoSyncIslandMig: sending some emigrants." );
+  }
 }
 
 
@@ -282,7 +282,7 @@ template< class EOT > void peoSyncIslandMig< EOT > :: immigrate()
     assert( imm.size() );
     replace( destination, imm.front() ) ;
     imm.pop();
-    printDebugMessage( "receiving some immigrants." );
+    printDebugMessage( "peoSyncIslandMig: receiving some immigrants." );
   }
   unlock();
 }
@@ -292,19 +292,19 @@ template< class EOT > void peoSyncIslandMig< EOT > :: operator()()
 {
 
   if ( !cont( source ) )
-    {
+  {
 
-      // sending emigrants
-      emigrate();
-      stop();
+    // sending emigrants
+    emigrate();
+    stop();
 
-      // synchronizing
-      sem_wait( &sync );
-      getOwner()->setActive();
+    // synchronizing
+    sem_wait( &sync );
+    getOwner()->setActive();
 
-      // receiving immigrants
-      immigrate();
-    }
+    // receiving immigrants
+    immigrate();
+  }
 }
 
 
@@ -315,13 +315,13 @@ template< class EOT > void peoSyncIslandMig< EOT > :: notifySending()
   {
 
     if ( imm.empty() )
-      {
+    {
 
-        printDebugMessage( "entering pasive mode\n" );
-        getOwner()->setPassive();
-      }
-  }
-  unlock();
+      printDebugMessage( "peoSyncIslandMig: entering pasive mode\n" );
+      getOwner()->setPassive();
+    }
+}
+unlock();
 
   resume();
 }
diff --git a/trunk/paradiseo-peo/src/peoSyncMultiStart.h b/trunk/paradiseo-peo/src/peoSyncMultiStart.h
index 424d2f733..84f920212 100644
--- a/trunk/paradiseo-peo/src/peoSyncMultiStart.h
+++ b/trunk/paradiseo-peo/src/peoSyncMultiStart.h
@@ -62,74 +62,74 @@ extern int getNodeRank();
 //! thus allowing for simple hybridization schemes which combine the evolutionary approach with a local search approach,
 //! for example, executed at the end of each generation.
 template< class EOT > class peoSyncMultiStart : public Service, public eoUpdater
-  {
+{
 
-  public:
+public:
 
-    //! Constructor function - several simple parameters are required for defining the characteristics of the multi-start model.
-    //!
-    //! @param eoContinue< EOT >& __cont - defined for including further functionality - no semantics associated at this time;
-    //! @param eoSelect< EOT >& __select - selection strategy for obtaining a subset of the initial population on which to apply the specified algorithm;
-    //! @param eoReplacement< EOT >& __replace - replacement strategy for integrating the resulting individuals in the initial population;
-    //! @param moAlgo< EOT >& __ls - algorithm to be applied on each of the selected individuals - a <b>moAlgo< EOT ></b>-derived object must be specified;
-    //! @param eoPop< EOT >& __pop - the initial population from which the individuals are selected for applying the specified algorithm.
-    peoSyncMultiStart(
+  //! Constructor function - several simple parameters are required for defining the characteristics of the multi-start model.
+  //!
+  //! @param eoContinue< EOT >& __cont - defined for including further functionality - no semantics associated at this time;
+  //! @param eoSelect< EOT >& __select - selection strategy for obtaining a subset of the initial population on which to apply the specified algorithm;
+  //! @param eoReplacement< EOT >& __replace - replacement strategy for integrating the resulting individuals in the initial population;
+  //! @param moAlgo< EOT >& __ls - algorithm to be applied on each of the selected individuals - a <b>moAlgo< EOT ></b>-derived object must be specified;
+  //! @param eoPop< EOT >& __pop - the initial population from which the individuals are selected for applying the specified algorithm.
+  peoSyncMultiStart(
 
-      eoContinue< EOT >& __cont,
-      eoSelect< EOT >& __select,
-      eoReplacement< EOT >& __replace,
-      moAlgo< EOT >& __ls,
-      eoPop< EOT >& __pop
-    );
+    eoContinue< EOT >& __cont,
+    eoSelect< EOT >& __select,
+    eoReplacement< EOT >& __replace,
+    moAlgo< EOT >& __ls,
+    eoPop< EOT >& __pop
+  );
 
-    //! Operator which synchronously executes the specified	algorithm on the individuals selected from the initial population.
-    //! There is no need to explicitly call the operator - automatically called as checkpoint operator.
-    void operator()();
+  //! Operator which synchronously executes the specified	algorithm on the individuals selected from the initial population.
+  //! There is no need to explicitly call the operator - automatically called as checkpoint operator.
+  void operator()();
 
-    //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
-    //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
-    void packData();
+  //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
+  //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
+  void packData();
 
-    //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
-    //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
-    void unpackData();
+  //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
+  //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
+  void unpackData();
 
-    //! Auxiliary function for actually executing the specified algorithm on one assigned individual. There is no need to
-    //! explicitly call the function.
-    void execute();
+  //! Auxiliary function for actually executing the specified algorithm on one assigned individual. There is no need to
+  //! explicitly call the function.
+  void execute();
 
-    //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
-    //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
-    void packResult();
+  //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
+  //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
+  void packResult();
 
-    //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
-    //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
-    void unpackResult();
+  //! Auxiliary function for transferring data between the process requesting the synchronous execution of the specified
+  //! algorithm and the process which actually executes the algorithm. There is no need to explicitly call the function.
+  void unpackResult();
 
-    //! Auxiliary function for notifications between the process requesting the synchronous multi-start execution
-    //! and the processes that performs the actual execution phase. There is no need to explicitly call the function.
-    void notifySendingData();
+  //! Auxiliary function for notifications between the process requesting the synchronous multi-start execution
+  //! and the processes that performs the actual execution phase. There is no need to explicitly call the function.
+  void notifySendingData();
 
-    //! Auxiliary function for notifications between the process requesting the synchronous multi-start execution
-    //! and the processes that performs the actual execution phase. There is no need to explicitly call the function.
-    void notifySendingAllResourceRequests();
+  //! Auxiliary function for notifications between the process requesting the synchronous multi-start execution
+  //! and the processes that performs the actual execution phase. There is no need to explicitly call the function.
+  void notifySendingAllResourceRequests();
 
-  private:
+private:
 
-    eoContinue< EOT >& cont;
-    eoSelect< EOT >& select;
-    eoReplacement< EOT >& replace;
+  eoContinue< EOT >& cont;
+  eoSelect< EOT >& select;
+  eoReplacement< EOT >& replace;
 
-    moAlgo< EOT >& ls;
+  moAlgo< EOT >& ls;
 
-    eoPop< EOT >& pop;
-    eoPop< EOT > sel;
-    eoPop< EOT > impr_sel;
+  eoPop< EOT >& pop;
+  eoPop< EOT > sel;
+  eoPop< EOT > impr_sel;
 
-    EOT sol;
-    unsigned idx;
-    unsigned num_term;
-  };
+  EOT sol;
+  unsigned idx;
+  unsigned num_term;
+};
 
 
 template< class EOT > peoSyncMultiStart< EOT > :: peoSyncMultiStart(
@@ -180,14 +180,14 @@ template< class EOT > void peoSyncMultiStart< EOT > :: unpackResult()
   num_term++;
 
   if ( num_term == sel.size() )
-    {
+  {
 
-      getOwner()->setActive();
-      replace( pop, impr_sel );
+    getOwner()->setActive();
+    replace( pop, impr_sel );
 
-      printDebugMessage( "replacing the improved individuals in the population." );
-      resume();
-    }
+    printDebugMessage( "replacing the improved individuals in the population." );
+    resume();
+  }
 }
 
 
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/comm.cpp b/trunk/paradiseo-peo/src/rmc/mpi/comm.cpp
index 3b26de542..7210f1202 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/comm.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/comm.cpp
@@ -51,6 +51,7 @@ static sem_t sem_comm_init;
 
 static Communicator * the_thread;
 
+
 Communicator :: Communicator (int * __argc, char * * * __argv) {
 
   the_thread = this;  
@@ -69,23 +70,28 @@ void Communicator :: start () {
 
     sendMessages ();
 
-    if (theEnd() || ! atLeastOneActiveRunner ())     
+    if (! atLeastOneActiveRunner () && ! atLeastOneActiveThread() && allResourcesFree ())
       break;
 
     receiveMessages ();
   }
 
   waitBuffers ();
-  sem_destroy(& sem_comm_init);
-
   printDebugMessage ("finalizing");
 
-  synchronizeNodes ();
+  //synchronizeNodes ();
 }
 
 void initCommunication () {
 
+  static bool initializedSemaphore = false;
+
+  if (initializedSemaphore) {
+    sem_destroy(& sem_comm_init);
+  }
+
   sem_init (& sem_comm_init, 0, 0);
+  initializedSemaphore = true;
 }
 
 void waitNodeInitialization () {
@@ -97,6 +103,3 @@ void wakeUpCommunicator () {
 
   the_thread -> wakeUp ();
 }
-
-
-
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/comm.h b/trunk/paradiseo-peo/src/rmc/mpi/comm.h
index 5184d45f1..7a343a595 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/comm.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/comm.h
@@ -43,7 +43,7 @@
 class Communicator : public ReactiveThread {
 
 public :
-  
+
   /* Ctor */
   Communicator (int * __argc, char * * * __argv);
 
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/coop.cpp b/trunk/paradiseo-peo/src/rmc/mpi/coop.cpp
index de6ce75a2..541677dd8 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/coop.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/coop.cpp
@@ -53,7 +53,7 @@ void Cooperative :: setOwner (Runner & __runner) {
 
 void Cooperative :: send (Cooperative * __coop) {
 
-  :: send (this, getRankOfRunner (__coop -> getOwner () -> getDefinitionID ()), COOP_TAG);   
+  :: send (this, getRankOfRunner (__coop -> getOwner () -> getDefinitionID ()), COOP_TAG);
   //  stop ();
 }
 
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/mess.cpp b/trunk/paradiseo-peo/src/rmc/mpi/mess.cpp
index a55cf4a29..addadc3b2 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/mess.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/mess.cpp
@@ -45,18 +45,26 @@
 	
 static char mpi_buf [MPI_BUF_SIZE];
 	
-static int pos_buf ;
+static int pos_buf;
 
 static std :: vector <char *> act_buf; /* Active buffers */
 
 static std :: vector <MPI_Request *> act_req; /* Active requests */
 
+void initBuffers () {
+
+  pos_buf = 0;
+  act_buf.clear ();
+  act_req.clear ();
+}
+
 void cleanBuffers () {
 
   for (unsigned i = 0; i < act_req.size ();) {
 
     MPI_Status stat ;
     int flag ;
+
     MPI_Test (act_req [i], & flag, & stat) ;
     if (flag) {
 
@@ -71,7 +79,7 @@ void cleanBuffers () {
     }
     else
       i ++;
-  } 
+  }
 }
 
 void waitBuffers () {
@@ -79,14 +87,14 @@ void waitBuffers () {
   printDebugMessage ("waiting the termination of the asynchronous operations to complete");
 
   for (unsigned i = 0; i < act_req.size (); i ++) {
-       
+
     MPI_Status stat ;
 
     MPI_Wait (act_req [i], & stat) ;
-      
+
     delete[] act_buf [i] ;
     delete act_req [i] ;
-  } 
+  }
 }
 
 bool probeMessage (int & __src, int & __tag) {
@@ -111,17 +119,17 @@ void waitMessage () {
 }
 
 void initMessage () {
-  
+
   pos_buf = 0;
 }
 
 void sendMessage (int __to, int __tag) {
 
-  cleanBuffers ();  
+  cleanBuffers ();
   act_buf.push_back (new char [pos_buf]);
-  act_req.push_back (new MPI_Request);  
-  memcpy (act_buf.back (), mpi_buf, pos_buf);  
-  MPI_Isend (act_buf.back (), pos_buf, MPI_PACKED, __to, __tag, MPI_COMM_WORLD, act_req.back ()); 
+  act_req.push_back (new MPI_Request);
+  memcpy (act_buf.back (), mpi_buf, pos_buf);
+  MPI_Isend (act_buf.back (), pos_buf, MPI_PACKED, __to, __tag, MPI_COMM_WORLD, act_req.back ());
 }
 
 void sendMessageToAll (int __tag) {
@@ -131,8 +139,8 @@ void sendMessageToAll (int __tag) {
 }
 
 void receiveMessage (int __from, int __tag) {
-  
-  MPI_Status stat;  
+
+  MPI_Status stat;
   MPI_Request req;
 
   MPI_Irecv (mpi_buf, MPI_BUF_SIZE, MPI_PACKED, __from, __tag, MPI_COMM_WORLD, & req);
@@ -200,7 +208,7 @@ void pack (const unsigned long & __ul, int __nitem) {
 
 /* String */
 void pack (const char * __str) {
-  
+
   int len = strlen (__str) + 1;
   MPI_Pack (& len, 1, MPI_INT, mpi_buf, MPI_BUF_SIZE, & pos_buf, MPI_COMM_WORLD);
   MPI_Pack ((void *) __str, len, MPI_CHAR, mpi_buf, MPI_BUF_SIZE, & pos_buf, MPI_COMM_WORLD);
@@ -267,4 +275,3 @@ void unpack (char * __str) {
   MPI_Unpack (mpi_buf, MPI_BUF_SIZE, & pos_buf, & len, 1, MPI_INT, MPI_COMM_WORLD);
   MPI_Unpack (mpi_buf, MPI_BUF_SIZE, & pos_buf, __str, len, MPI_CHAR, MPI_COMM_WORLD);    
 }
-
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/mess.h b/trunk/paradiseo-peo/src/rmc/mpi/mess.h
index 0b8264b9b..f7efecee7 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/mess.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/mess.h
@@ -47,6 +47,8 @@ extern void sendMessageToAll (int __tag);
 
 extern void receiveMessage (int __from, int __tag);
 
+extern void initBuffers ();
+
 extern void cleanBuffers ();
 
 extern void waitBuffers ();
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/node.cpp b/trunk/paradiseo-peo/src/rmc/mpi/node.cpp
index b989d228d..e1e3707ce 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/node.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/node.cpp
@@ -40,6 +40,8 @@
 #include <string>
 #include <cassert>
 
+#include "mess.h"
+
 
 class MPIThreadedEnv {
 
@@ -63,7 +65,7 @@ public:
 
 private:
 
-  /* No instance of this class can be created outside its domain */
+  /* No instance of this class can be created outside its domain! */
   MPIThreadedEnv ( int * __argc, char * * * __argv ) {
 
     static bool MPIThreadedEnvInitialized = false;
@@ -72,6 +74,7 @@ private:
     if (! MPIThreadedEnvInitialized) {
 
       MPI_Init_thread (__argc, __argv, MPI_THREAD_FUNNELED, & provided);  
+
       assert (provided == MPI_THREAD_FUNNELED); /* The MPI implementation must be multi-threaded.
 					       Yet, only one thread performs the comm.
 					       operations */
@@ -92,6 +95,7 @@ static std :: map <std :: string, int> name_to_rk;
 
 static std :: vector <std :: string> rk_to_name;
 
+
 int getNodeRank () {
 
   return rk;
@@ -102,6 +106,11 @@ int getNumberOfNodes () {
   return sz;
 }
 
+void collectiveCountOfRunners ( unsigned int* num_local_exec_runners, unsigned int* num_exec_runners ) {
+
+  MPI_Allreduce( num_local_exec_runners, num_exec_runners, 1, MPI_UNSIGNED, MPI_SUM, MPI_COMM_WORLD );
+}
+
 int getRankFromName (const std :: string & __name) {
 
   return atoi (__name.c_str ());  
@@ -112,9 +121,8 @@ void initNode (int * __argc, char * * * __argv) {
   rk_to_name.clear ();
   name_to_rk.clear ();
 
-
   MPIThreadedEnv :: init ( __argc, __argv );
-
+  //synchronizeNodes();
 
   MPI_Comm_rank (MPI_COMM_WORLD, & rk);   /* Who ? */
   MPI_Comm_size (MPI_COMM_WORLD, & sz);    /* How many ? */
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/node.h b/trunk/paradiseo-peo/src/rmc/mpi/node.h
index 76babf5b7..66610c91f 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/node.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/node.h
@@ -44,6 +44,8 @@ extern int getNodeRank (); /* It gives the rank of the calling process */
 
 extern int getNumberOfNodes (); /* It gives the size of the environment (Total number of nodes) */
 
+extern void collectiveCountOfRunners ( unsigned int* num_local_exec_runners, unsigned int* num_exec_runners );
+
 extern int getRankFromName (const std :: string & __name); /* It gives the rank of the process
 							      expressed by its name */
 
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/recv.cpp b/trunk/paradiseo-peo/src/rmc/mpi/recv.cpp
index 5bbf27c05..9ea9cf7fd 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/recv.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/recv.cpp
@@ -130,7 +130,5 @@ void receiveMessages () {
       };
     }
 
-  } while ( ! atLeastOneActiveThread () && atLeastOneActiveRunner () /*&& ! allResourcesFree ()*/);
-
-  cleanBuffers ();
+  } while ( ! atLeastOneActiveThread () && atLeastOneActiveRunner () /*&& ! allResourcesFree ()*/ );
 }
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/rmc.cpp b/trunk/paradiseo-peo/src/rmc/mpi/rmc.cpp
index 9d846dd47..34e30a94a 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/rmc.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/rmc.cpp
@@ -45,6 +45,7 @@ static std :: vector <pthread_t *> ll_threads; /* Low level threads */
 static std :: vector <Worker *> worker_threads; /* Worker threads */
 static Communicator* communicator_thread = NULL; /* Communicator thread */
 
+
 void runRMC () {
 
   /* Worker(s) ? */
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/scheduler.cpp b/trunk/paradiseo-peo/src/rmc/mpi/scheduler.cpp
index 6f7837b3e..617c81cf5 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/scheduler.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/scheduler.cpp
@@ -47,6 +47,8 @@ static std :: queue <SCHED_REQUEST> requests; /* Requests */
 
 static unsigned initNumberOfRes = 0;
 
+extern void wakeUpCommunicator();
+
 void initScheduler () {
 
   resources = std :: queue <SCHED_RESOURCE> ();
@@ -57,36 +59,39 @@ void initScheduler () {
 
     const Node & node = the_schema [i];
 
-    if (node.rk_sched == my_node -> rk)      
+    if (node.rk_sched == my_node -> rk)
       for (unsigned j = 0; j < node.num_workers; j ++)
-	resources.push (std :: pair <RANK_ID, WORKER_ID> (i, j + 1));    
-  }  
+        resources.push (std :: pair <RANK_ID, WORKER_ID> (i, j + 1));
+  }
   initNumberOfRes = resources.size ();
 }
 
 bool allResourcesFree () {
-
   return resources.size () == initNumberOfRes;
 }
 
+unsigned numResourcesFree () {
+  return resources.size ();
+}
+
 static void update () {
 
   unsigned num_alloc = std :: min (resources.size (), requests.size ());
-  
+
   for (unsigned i = 0; i < num_alloc; i ++) {
-    
+
     SCHED_REQUEST req = requests.front ();
     requests.pop ();
-    
+
     SCHED_RESOURCE res = resources.front ();
     resources.pop ();
 
-    printDebugMessage ("allocating a resource.");    
+    printDebugMessage ("allocating a resource.");
     initMessage ();
     pack (req.second);
     pack (res);
     sendMessage (req.first, SCHED_RESULT_TAG);
-  }  
+  }
 }
 
 void unpackResourceRequest () {
@@ -107,4 +112,5 @@ void unpackTaskDone () {
   if (resources.size () == initNumberOfRes)
     printDebugMessage ("all the resources are now free.");
   update ();
+  wakeUpCommunicator();
 }
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/scheduler.h b/trunk/paradiseo-peo/src/rmc/mpi/scheduler.h
index cbb61891a..f5fc71a13 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/scheduler.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/scheduler.h
@@ -57,4 +57,6 @@ extern void unpackTaskDone ();
 
 extern bool allResourcesFree ();
 
+extern unsigned numResourcesFree ();
+
 #endif
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/schema.cpp b/trunk/paradiseo-peo/src/rmc/mpi/schema.cpp
index f7f98d47b..b1185d365 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/schema.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/schema.cpp
@@ -76,7 +76,7 @@ static void loadNode (int __rk_sched) {
 
     /* TAG: <runner> | </node> */
     std :: string name = getNextNode ();
-    assert (name == "runner" || name == "node");    
+    assert (name == "runner" || name == "node");
     if (name == "runner") {
       /* TAG: </node> */
       node.id_run.push_back (atoi (getNextNode ().c_str ()));
@@ -105,7 +105,7 @@ static void loadGroup () {
 
     /* TAG: <node> | </group> */
     name = getNextNode ();
-    assert (name == "node" || name == "group");    
+    assert (name == "node" || name == "group");
     if (name == "node")
       /* TAG: <node> */
       loadNode (rk_sched);
@@ -173,7 +173,7 @@ void loadSchema (const char * __filename) {
   printDebugMessage (mess);
 
   if (isScheduleNode ())
-    printDebugMessage ("I'am a scheduler");  
+    printDebugMessage ("I'am a scheduler");
 
   for (unsigned i = 0; i < my_node -> id_run.size (); i ++) {
     sprintf (mess, "I manage the runner %d", my_node -> id_run [i]);
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/schema.h b/trunk/paradiseo-peo/src/rmc/mpi/schema.h
index 6feabadc7..0381bd5cd 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/schema.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/schema.h
@@ -47,7 +47,7 @@
 typedef int RANK_ID;
 
 struct Node {
-  
+
   RANK_ID rk; /* Rank */
   std :: string name; /* Host name */
   unsigned num_workers; /* Number of parallel workers */
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/send.cpp b/trunk/paradiseo-peo/src/rmc/mpi/send.cpp
index 03bc31c19..d36dc0d88 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/send.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/send.cpp
@@ -49,6 +49,7 @@
 
 #define TO_ALL -1
 
+
 typedef struct {
 
   Communicable * comm;
@@ -56,28 +57,28 @@ typedef struct {
   int tag;
 
 } SEND_REQUEST;
-	
+
+
 static std :: queue <SEND_REQUEST> mess;
 
 static sem_t sem_send;
 
 static bool contextInitialized = false;
 
+
 void initSending () {
 
-  static bool initializedSem = false;
+  static bool initializedSemaphore = false;
 
   mess = std :: queue <SEND_REQUEST> ();
 
-  if (! initializedSem) {
-    sem_init (& sem_send, 0, 1);
-    initializedSem = true;
-  }
-  else {
+  if (initializedSemaphore) {
     sem_destroy(& sem_send);
-    sem_init (& sem_send, 0, 1);
   }
 
+  sem_init (& sem_send, 0, 1);
+  initializedSemaphore = true;
+
   contextInitialized = false;
 }
 
@@ -103,13 +104,13 @@ extern void initializeContext ();
 
 void sendMessages () {
 
-  sem_wait (& sem_send);
-
   if (! contextInitialized) {
     contextInitialized = true;
     initializeContext();
   }
 
+  sem_wait (& sem_send);
+
   while (! mess.empty ()) {
 
     SEND_REQUEST req = mess.front ();
@@ -132,7 +133,7 @@ void sendMessages () {
 
     case SCHED_REQUEST_TAG:
       dynamic_cast <Service *> (comm) -> packResourceRequest ();
-      dynamic_cast <Service *> (comm) -> notifySendingResourceRequest ();            
+      dynamic_cast <Service *> (comm) -> notifySendingResourceRequest ();
       break;
 
     case TASK_RESULT_TAG:
@@ -157,5 +158,5 @@ void sendMessages () {
     mess.pop ();
   }
 
-  sem_post (& sem_send);  
+  sem_post (& sem_send);
 }
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/tags.h b/trunk/paradiseo-peo/src/rmc/mpi/tags.h
index 92d5ac1a2..8fb7f8a84 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/tags.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/tags.h
@@ -48,6 +48,4 @@
 #define TASK_RESULT_TAG 19
 #define TASK_DONE_TAG 20
 
-#define EXECUTION_CONTEXT_TAG 1000
-
 #endif
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/worker.cpp b/trunk/paradiseo-peo/src/rmc/mpi/worker.cpp
index 0dc242389..ee88cfb19 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/worker.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/worker.cpp
@@ -46,26 +46,32 @@
 
 static std :: vector <Worker *> key_to_worker (1); /* Vector of registered workers */
 
+extern void wakeUpCommunicator ();
+
 Worker * getWorker (WORKER_ID __key) {
 
-  return key_to_worker [__key];  
+  return key_to_worker [__key];
 }
 
 Worker :: Worker () {
-  
+
   recvAndCompleted = false;
+  taskAssigned = 0;
   id = key_to_worker.size ();
   key_to_worker.push_back (this);
+
+  sem_init( &sem_task_done, 0, 0 );
 }
 
 void Worker :: packResult () {
-  
+
   pack (serv_id);
-  serv -> packResult ();    
+  serv -> packResult ();
 }
 
 void Worker :: unpackData () {
 
+  taskAssigned ++;
   printDebugMessage ("unpacking the ID. of the service.");
   unpack (serv_id);
   serv = getService (serv_id); 
@@ -90,9 +96,10 @@ void Worker :: notifySendingResult () {
 
 void Worker :: notifySendingTaskDone () {
 
+  sem_post(&sem_task_done);
   setPassive ();
 }
-  
+
 void Worker :: setSource (int __rank) {
 
   src = __rank;
@@ -102,22 +109,28 @@ void Worker :: start () {
 
   while (true) {
 
-    sleep (); 
+    sleep ();
 
-    if (! atLeastOneActiveRunner ())
+    if (! atLeastOneActiveRunner () && ! taskAssigned)
       break;
 
     if (recvAndCompleted) {
       send (this, my_node -> rk_sched, TASK_DONE_TAG);  
       recvAndCompleted = false;
+      sem_wait(&sem_task_done);
+      taskAssigned --;
     }
     else {
 
-      printDebugMessage ("executing the task.");
-      serv -> execute ();   
-      send (this, src, TASK_RESULT_TAG);    
+      serv -> execute ();
+      send (this, src, TASK_RESULT_TAG);
     }
   }
+
+  printDebugMessage ("Worker finished execution.");
+  setPassive ();
+
+  wakeUpCommunicator();
 }
 
 void initWorkersEnv () {
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/worker.h b/trunk/paradiseo-peo/src/rmc/mpi/worker.h
index 709a10584..5576fa4f0 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/worker.h
+++ b/trunk/paradiseo-peo/src/rmc/mpi/worker.h
@@ -46,7 +46,7 @@ typedef unsigned WORKER_ID;
 
 class Worker : public Communicable, public ReactiveThread {
 
-public : 
+public :
 
   Worker ();
 
@@ -56,14 +56,14 @@ public :
 
   void unpackData ();
 
-  void packTaskDone (); 
+  void packTaskDone ();
 
   void notifySendingResult ();
 
   void notifySendingTaskDone ();
-  
+
   void setSource (int __rank);
-  
+
 private :
 
   WORKER_ID id;
@@ -72,6 +72,10 @@ private :
   int src;
 
   bool recvAndCompleted;
+  unsigned taskAssigned;
+
+  sem_t sem_task_done;
+  sem_t sem_task_asgn;
 };
 
 extern void initWorkersEnv ();
diff --git a/trunk/paradiseo-peo/src/rmc/mpi/xml_parser.cpp b/trunk/paradiseo-peo/src/rmc/mpi/xml_parser.cpp
index 706468cba..052f4c1b3 100644
--- a/trunk/paradiseo-peo/src/rmc/mpi/xml_parser.cpp
+++ b/trunk/paradiseo-peo/src/rmc/mpi/xml_parser.cpp
@@ -41,11 +41,11 @@
 static xmlTextReaderPtr reader;
 
 void openXMLDocument (const char * __filename) {
-  
+
   reader = xmlNewTextReaderFilename (__filename);
-  
+
   if (! reader) {
-    
+
     fprintf (stderr, "unable to open '%s'.\n", __filename);
     exit (1);
   }
@@ -57,18 +57,18 @@ void closeXMLDocument () {
 }
 
 std :: string getAttributeValue (const std :: string & __attr) {
-  
+
   xmlChar * value = xmlTextReaderGetAttribute (reader, (const xmlChar *) __attr.c_str ());
-  
+
   std :: string str ((const char *) value);
-  
+
   xmlFree (value);
-  
+
   return str;
 }
 
 static bool isSep (const xmlChar * __text) {
-  
+
   for (unsigned i = 0; i < strlen ((char *) __text); i ++)
     if (__text [i] != ' ' && __text [i] != '\t' && __text [i] != '\n')
       return false;
@@ -76,7 +76,7 @@ static bool isSep (const xmlChar * __text) {
 }
 
 std :: string getNextNode () {
-  
+
   xmlChar * name, * value;
 
   do {
@@ -91,12 +91,11 @@ std :: string getNextNode () {
     str.assign ((char *) name);
   else
     str.assign ((char *) value);
-  
+
   if (name)
     xmlFree (name);
   if (value)
     xmlFree (value);
-    
+
   return str;
 }
-