diff --git a/smp/src/abstractIsland.h b/smp/src/abstractIsland.h
index 00317a485..9ecbf7216 100644
--- a/smp/src/abstractIsland.h
+++ b/smp/src/abstractIsland.h
@@ -51,7 +51,7 @@ The abstract island is used to manipulate island pointers wihout the knowledge o
 @see smp::Island
 */
 
-template<class EOT>
+template<class bEOT>
 class AIsland
 {
 public:
@@ -61,9 +61,7 @@ public:
     /**
      * Check if there is population to receive
      */
-    virtual void setModel(IslandModel<EOT>* _model) = 0;
-    
-
+    virtual void setModel(IslandModel<bEOT>* _model) = 0;
     
     /**
      * Check if there is population to receive or to emigrate
@@ -73,7 +71,7 @@ public:
     /**
      * Update the island  by adding population to send in the imigrants list.
      */
-    virtual void update(eoPop<EOT> _data) = 0;
+    virtual void update(eoPop<bEOT> _data) = 0;
     
     /**
      * Check if the algorithm is stopped.
diff --git a/smp/src/island.cpp b/smp/src/island.cpp
index 889ade6eb..6bd865ee4 100644
--- a/smp/src/island.cpp
+++ b/smp/src/island.cpp
@@ -29,7 +29,7 @@ Contact: paradiseo-help@lists.gforge.inria.fr
 
 template<template <class> class EOAlgo, class EOT, class bEOT>
 template<class... Args>
-paradiseo::smp::Island<EOAlgo,EOT,bEOT>::Island(std::function<EOT(bEOT&)> _convertFromBase, std::function<bEOT(EOT&)> _convertToBase, eoPop<EOT>& _pop, IntPolicy<EOT>& _intPolicy, MigPolicy<EOT>& _migPolicy, Args&... args) :
+paradiseo::smp::Island<EOAlgo,EOT,bEOT>::Island(std::function<EOT&&(bEOT&)> _convertFromBase, std::function<bEOT&&(EOT&)> _convertToBase, eoPop<EOT>& _pop, IntPolicy<EOT>& _intPolicy, MigPolicy<EOT>& _migPolicy, Args&... args) :
     // The PPExpander looks for the continuator in the parameters pack.
     // The private inheritance of ContWrapper wraps the continuator and add islandNotifier.
     ContWrapper<EOT, bEOT>(Loop<Args...>().template findValue<eoContinue<EOT>>(args...), this),
@@ -54,8 +54,8 @@ template<class... Args>
 paradiseo::smp::Island<EOAlgo,EOT,bEOT>::Island(eoPop<EOT>& _pop, IntPolicy<EOT>& _intPolicy, MigPolicy<EOT>& _migPolicy, Args&... args) :
     Island(
     // Default conversion functions for homogeneous islands
-    [](bEOT& i) -> EOT { return (EOT)i; },
-    [](EOT& i) -> bEOT { return (bEOT)i; },
+    [](bEOT& i) -> EOT&& { return std::forward<EOT>(i); },
+    [](EOT& i) -> bEOT&& { return std::forward<bEOT>(i); },
     _pop, _intPolicy, _migPolicy, args...)
 { }
 
@@ -114,7 +114,7 @@ void paradiseo::smp::Island<EOAlgo,EOT,bEOT>::send(eoSelect<EOT>& _select)
         for(auto& indi : migPop)
             baseMigPop.push_back(convertToBase(indi));
             
-        std::cout << "On envoie de l'île : " << migPop << std::endl;
+        //std::cout << "On envoie de l'île : " << migPop << std::endl;
        
         // Delete delivered messages
         for(auto it = sentMessages.begin(); it != sentMessages.end(); it++)
@@ -131,7 +131,7 @@ void paradiseo::smp::Island<EOAlgo,EOT,bEOT>::receive(void)
     std::lock_guard<std::mutex> lock(this->m);
     while (!listImigrants.empty())
     { 
-        std::cout << "On reçoit dans l'île : " << listImigrants.size() << std::endl;
+        //std::cout << "On reçoit dans l'île : " << listImigrants.size() << std::endl;
         eoPop<bEOT> base_offspring = listImigrants.front();
         
         // Convert objects from base to our objects type
@@ -152,7 +152,7 @@ void paradiseo::smp::Island<EOAlgo,EOT,bEOT>::receive(void)
 template<template <class> class EOAlgo, class EOT, class bEOT>
 void paradiseo::smp::Island<EOAlgo,EOT,bEOT>::update(eoPop<bEOT> _data)
 {
-    std::cout << "On update dans l'île" << std::endl;
+    //std::cout << "On update dans l'île" << std::endl;
     std::lock_guard<std::mutex> lock(this->m);
     listImigrants.push(_data);
 }
diff --git a/smp/src/island.h b/smp/src/island.h
index 018e73023..42b5ee3ac 100644
--- a/smp/src/island.h
+++ b/smp/src/island.h
@@ -75,7 +75,7 @@ public:
      * @param args Parameters to construct the algorithm.
      */
     template<class... Args>
-    Island(std::function<EOT(bEOT&)> _convertFromBase, std::function<bEOT(EOT&)> _convertToBase, eoPop<EOT>& pop, IntPolicy<EOT>& _intPolicy, MigPolicy<EOT>& _migPolicy, Args&... args);
+    Island(std::function<EOT&&(bEOT&)> _convertFromBase, std::function<bEOT&&(EOT&)> _convertToBase, eoPop<EOT>& pop, IntPolicy<EOT>& _intPolicy, MigPolicy<EOT>& _migPolicy, Args&... args);
     /**
      * Constructor
      * @param _popSize Size of the algorithm population.
diff --git a/smp/src/islandModel.cpp b/smp/src/islandModel.cpp
index 00e385b26..c2eb4e00b 100644
--- a/smp/src/islandModel.cpp
+++ b/smp/src/islandModel.cpp
@@ -107,7 +107,7 @@ template<class EOT>
 void paradiseo::smp::IslandModel<EOT>::update(eoPop<EOT> _data, AIsland<EOT>* _island)
 {
     std::lock_guard<std::mutex> lock(m);
-    std::cout << "Mediateur reçoit ! " << _data << std::endl;
+    //std::cout << "Mediateur reçoit ! " << _data << std::endl;
     listEmigrants.push(std::pair<eoPop<EOT>,AIsland<EOT>*>(_data, _island));
 }
 
@@ -134,7 +134,7 @@ void paradiseo::smp::IslandModel<EOT>::send(void)
     std::lock_guard<std::mutex> lock(m);
     while (!listEmigrants.empty())
     {
-        std::cout << "Mediator envoie ! " << listEmigrants.size() << std::endl;
+        //std::cout << "Mediator envoie ! " << listEmigrants.size() << std::endl;
         // Get the neighbors
         unsigned idFrom = table.getLeft()[listEmigrants.front().second];
         std::vector<unsigned> neighbors = topo.getIdNeighbors(idFrom);
diff --git a/smp/test/CMakeLists.txt b/smp/test/CMakeLists.txt
index cbc7ab805..076a38040 100644
--- a/smp/test/CMakeLists.txt
+++ b/smp/test/CMakeLists.txt
@@ -19,7 +19,7 @@ set (TEST_LIST
         t-smpIsland
         t-smpTopo
         t-smpMI_Homogeneous
-        #t-smpMI_Heterogeneous
+        t-smpMI_Heterogeneous
 		)
 
 ######################################################################################
diff --git a/smp/test/t-smpMI_Heterogeneous.cpp b/smp/test/t-smpMI_Heterogeneous.cpp
new file mode 100644
index 000000000..d304ab5b4
--- /dev/null
+++ b/smp/test/t-smpMI_Heterogeneous.cpp
@@ -0,0 +1,220 @@
+#include <smp>
+#include <eo>
+#include <ga.h>
+
+#include "smpTestClass.h"
+
+using namespace paradiseo::smp;
+using namespace std;
+
+typedef eoBit<double> Indi2;     // A bitstring with fitness double
+
+// Conversion functions
+Indi2 fromBase(Indi& i, unsigned size)
+{
+    // Dummy conversion. We just create a new Indi2
+    Indi2 v;
+    for (unsigned ivar=0; ivar<size; ivar++)
+	{
+	      bool r = rng.flip(); // new value, random in {0,1}
+	      v.push_back(r);      // append that random value to v
+	}
+    std::cout << "Convert from base : " << v << std::endl;
+    return v;
+}
+
+Indi toBase(Indi2& i)
+{
+    // Dummy conversion. We just create a new Indi
+    Indi v;
+    std::cout << "Convert to base : " << v << std::endl;
+    return v;
+}
+
+// EVAL
+//-----------------------------------------------------------------------------
+// a simple fitness function that computes the number of ones of a bitstring
+//  @param _Indi2 A biststring Indi2vidual
+
+double binary_value(const Indi2 & _Indi2)
+{
+  double sum = 0;
+  for (unsigned i = 0; i < _Indi2.size(); i++)
+    sum += _Indi2[i];
+  return sum;
+}
+// GENERAL
+//-----------------------------------------------------------------------------
+
+int main(void)
+{
+// PARAMETRES
+  // all parameters are hard-coded!
+  const unsigned int SEED = 42;      // seed for random number generator
+  const unsigned int T_SIZE = 3;     // size for tournament selection
+  const unsigned int VEC_SIZE = 16;   // Number of bits in genotypes
+  const unsigned int POP_SIZE = 10;  // Size of population
+  const unsigned int MAX_GEN = 10;  // Maximum number of generation before STOP
+  const float CROSS_RATE = 0.8;      // Crossover rate
+  const double P_MUT_PER_BIT = 0.01; // probability of bit-flip mutation
+  const float MUT_RATE = 1.0;        // mutation rate
+
+// GENERAL
+  //////////////////////////
+  //  Random seed
+  //////////////////////////
+  //reproducible random seed: if you don't change SEED above,
+  // you'll aways get the same result, NOT a random run
+  rng.reseed(SEED);
+
+// EVAL
+  /////////////////////////////
+  // Fitness function
+  ////////////////////////////
+  // Evaluation: from a plain C++ fn to an EvalFunc Object
+  eoEvalFuncPtr<Indi2> eval(  binary_value );
+
+// INIT
+  ////////////////////////////////
+  // Initilisation of population
+  ////////////////////////////////
+
+  // declare the population
+  eoPop<Indi2> pop;
+  // fill it!
+  for (unsigned int igeno=0; igeno<POP_SIZE; igeno++)
+    {
+      Indi2 v;           // void Indi2vidual, to be filled
+      for (unsigned ivar=0; ivar<VEC_SIZE; ivar++)
+	{
+	  bool r = rng.flip(); // new value, random in {0,1}
+	  v.push_back(r);      // append that random value to v
+	}
+      eval(v);                 // evaluate it
+      pop.push_back(v);        // and put it in the population
+    }
+
+// ENGINE
+  /////////////////////////////////////
+  // selection and replacement
+  ////////////////////////////////////
+// SELECT
+  // The robust tournament selection
+  eoDetTournamentSelect<Indi2> select(T_SIZE);  // T_SIZE in [2,POP_SIZE]
+
+// REPLACE
+  // The simple GA evolution engine uses generational replacement
+  // so no replacement procedure is needed
+
+// OPERATORS
+  //////////////////////////////////////
+  // The variation operators
+  //////////////////////////////////////
+// CROSSOVER
+  // 1-point crossover for bitstring
+  eo1PtBitXover<Indi2> xover;
+// MUTATION
+  // standard bit-flip mutation for bitstring
+  eoBitMutation<Indi2>  mutation(P_MUT_PER_BIT);
+
+// STOP
+// CHECKPOINT
+  //////////////////////////////////////
+  // termination condition
+  /////////////////////////////////////
+  // stop after MAX_GEN generations
+  eoGenContinue<Indi2> continuator(MAX_GEN);
+
+// GENERATION
+  /////////////////////////////////////////
+  // the algorithm
+  ////////////////////////////////////////
+  // standard Generational GA requires as parameters
+  // selection, evaluation, crossover and mutation, stopping criterion
+
+// // Emigration policy
+        // // // Element 1 
+        eoPeriodicContinue<Indi2> criteria(1);
+        eoDetTournamentSelect<Indi2> selectOne(2);
+        eoSelectNumber<Indi2> who(selectOne, 1);
+        
+        MigPolicy<Indi2> migPolicy;
+        migPolicy.push_back(PolicyElement<Indi2>(who, criteria));
+        
+        // // Integration policy
+        eoPlusReplacement<Indi2> intPolicy;
+        
+        // We bind conversion functions
+        auto frombase = std::bind(fromBase, std::placeholders::_1, VEC_SIZE);
+        auto tobase = std::bind(toBase, std::placeholders::_1);
+
+  Island<eoSGA,Indi2, Indi> gga(frombase, tobase, pop, intPolicy, migPolicy, select, xover, CROSS_RATE, mutation, MUT_RATE,
+		  eval, continuator);
+//////////////////////////////////////////////////////////////////
+        typedef struct {
+        unsigned popSize = 10;
+        unsigned tSize = 2;
+        double pCross = 0.8;
+        double pMut = 0.7;
+        unsigned maxGen = 10;
+    } Param; 
+
+    Param param;
+
+    loadInstances("t-data.dat", n, bkv, a, b);
+      
+    // Evaluation function
+    IndiEvalFunc plainEval;
+    
+    // Init a solution
+    IndiInit chromInit;
+    
+    // Define selection
+    eoDetTournamentSelect<Indi> selectOne2(param.tSize);
+    eoSelectPerc<Indi> select2(selectOne2);// by default rate==1
+
+    // Define operators for crossover and mutation
+    IndiXover Xover;                 // CROSSOVER
+    IndiSwapMutation  mutationSwap;  // MUTATION
+      
+    // Encapsule in a tranform operator
+    eoSGATransform<Indi> transform(Xover, param.pCross, mutationSwap, param.pMut);
+    
+    // Define replace operator
+    eoPlusReplacement<Indi> replace;
+
+    eoGenContinue<Indi> genCont(param.maxGen); // generation continuation
+    
+    // Define population
+    eoPop<Indi> pop2(param.popSize, chromInit);
+
+    // Island 1
+    // // Emigration policy
+    // // // Element 1 
+    eoPeriodicContinue<Indi> criteria2(1);
+    eoDetTournamentSelect<Indi> selectOne3(5);
+    eoSelectNumber<Indi> who2(selectOne3, 2);
+        
+    MigPolicy<Indi> migPolicy2;
+    migPolicy2.push_back(PolicyElement<Indi>(who2, criteria2));
+        
+    // // Integration policy
+    eoPlusReplacement<Indi> intPolicy2;
+
+    Island<eoEasyEA,Indi> test(pop2, intPolicy2, migPolicy2, genCont, plainEval, select2, transform, replace);
+    
+    // Topology
+        Topology<Complete> topo;
+        
+        IslandModel<Indi> model(topo);
+        model.add(test);
+        model.add(gga);
+        
+        model();
+        
+        cout << test.getPop() << endl;
+        cout << gga.getPop() << endl;
+
+
+    return 0;
+}