diff --git a/smp/src/bimap.h b/smp/src/bimap.h
index 4b1adfed6..8d85bc102 100644
--- a/smp/src/bimap.h
+++ b/smp/src/bimap.h
@@ -57,13 +57,6 @@ public:
     {
         rightAssociation[a] = b;
         leftAssociation[b] = a;
-        
-        std::cout << "DUMP" << std::endl;
-        for(auto i : rightAssociation)
-            std::cout << i.first << "------" << i.second << std::endl;
-        for(auto i : leftAssociation)
-            std::cout << i.first << "------" << i.second << std::endl;
-        std::cout << "END DUMP" << std::endl;
     }
     
     std::map<A,B> getRight() const
diff --git a/smp/src/island.cpp b/smp/src/island.cpp
index 52b9b74af..1d9cb8a52 100644
--- a/smp/src/island.cpp
+++ b/smp/src/island.cpp
@@ -43,7 +43,8 @@ paradiseo::smp::Island<EOAlgo,EOT>::Island(unsigned _popSize, eoInit<EOT>& _chro
     pop(_popSize, _chromInit),
     intPolicy(_intPolicy),
     migPolicy(_migPolicy),
-    stopped(false)
+    stopped(false),
+    model(nullptr)
 {
     // Check in compile time the inheritance thanks to type_trait.
     static_assert(std::is_base_of<eoAlgo<EOT>,EOAlgo<EOT>>::value, "Algorithm must inherit from eoAlgo<EOT>");
@@ -58,6 +59,7 @@ void paradiseo::smp::Island<EOAlgo,EOT>::operator()()
     for(auto& message : sentMessages)
         message.join();
     stopped = true;
+    //std::cout << "Fin de l'île " << this << std::endl;
 }
 
 template<template <class> class EOAlgo, class EOT>
@@ -96,39 +98,37 @@ bool paradiseo::smp::Island<EOAlgo,EOT>::isStopped(void) const
 template<template <class> class EOAlgo, class EOT>
 void paradiseo::smp::Island<EOAlgo,EOT>::send(eoSelect<EOT>& _select)
 {
-    //std::cout << "Ile lance la migration" << std::endl;
-    eoPop<EOT> migPop;
-    _select(pop, migPop);
-    //std::cout << "   La population migrante est :" << std::endl << migPop << std::endl;
-    
-    // Delete delivered messages
-    for(auto it = sentMessages.begin(); it != sentMessages.end(); it++)
-        if(!it->joinable())
-            sentMessages.erase(it);
-  
-    sentMessages.push_back(std::thread(&IslandModel<EOT>::update, model, migPop, this));
-
+    if(model != nullptr)
+    {
+        //std::cout << "Ile lance la migration" << std::endl;
+        eoPop<EOT> migPop;
+        _select(pop, migPop);
+        //std::cout << "   La population migrante est :" << std::endl << migPop << std::endl;
+        
+        // Delete delivered messages
+        for(auto it = sentMessages.begin(); it != sentMessages.end(); it++)
+            if(!it->joinable())
+                sentMessages.erase(it);
+      
+        sentMessages.push_back(std::thread(&IslandModel<EOT>::update, model, migPop, this));
+    }
 }
 
 template<template <class> class EOAlgo, class EOT>
 void paradiseo::smp::Island<EOAlgo,EOT>::receive(void)
 {
     std::lock_guard<std::mutex> lock(this->m);
-    if(!listImigrants.empty()) {
-    std::cout << "______________________________________________" << std::endl;
-    std::cout << "Ile : " << this << std::endl;
-    std::cout << "Pop avant : " << std::endl << pop << std::endl;
     while (!listImigrants.empty())
     {
         
         eoPop<EOT> offspring = listImigrants.front();
         
         // Evaluate objects to integrate
-        std::cout << "Evaluation des individus : " << std::endl;
+        //std::cout << "Evaluation des individus : " << std::endl;
         for(auto& indi : offspring)
         {
             eval(indi);
-            std::cout << indi << std::endl;
+            //std::cout << indi << std::endl;
         }
         //std::cout << "Ile " << this << " recoit : " << std::endl;
         //std::cout << offspring << std::endl;
@@ -137,9 +137,6 @@ void paradiseo::smp::Island<EOAlgo,EOT>::receive(void)
         listImigrants.pop();
 
     }
-    std::cout << "Pop après : " << std::endl << pop << std::endl;
-        std::cout << "______________________________________________" << std::endl;
-    }    
 }
 
 template<template <class> class EOAlgo, class EOT>
diff --git a/smp/src/island.h b/smp/src/island.h
index a638407a8..9597c5b30 100644
--- a/smp/src/island.h
+++ b/smp/src/island.h
@@ -117,7 +117,6 @@ protected:
      */
     virtual void receive(void);
     
-    IslandModel<EOT>* model; 
     eoEvalFunc<EOT>& eval;               
     eoPop<EOT> pop;
     EOAlgo<EOT> algo;
@@ -126,7 +125,7 @@ protected:
     MigPolicy<EOT>& migPolicy;
     std::atomic<bool> stopped;
     std::vector<std::thread> sentMessages;
-    
+    IslandModel<EOT>* model; 
 };
 
 #include <island.cpp>
diff --git a/smp/src/islandModel.cpp b/smp/src/islandModel.cpp
index f73253731..69d01a0eb 100644
--- a/smp/src/islandModel.cpp
+++ b/smp/src/islandModel.cpp
@@ -64,9 +64,14 @@ void paradiseo::smp::IslandModel<EOT>::operator()()
         // Count working islands
         workingThread = islands.size();
         for(auto& it : islands)
+        {
+            // If an island is stopped we need to isolate its node in the topology
             if(it->isStopped())
+            {
                 workingThread--;
-                
+                topo.isolateNode(table.getLeft()[it]);
+            }
+        }        
         // Check reception
         send();
         
@@ -95,14 +100,14 @@ void paradiseo::smp::IslandModel<EOT>::send(void)
     std::lock_guard<std::mutex> lock(m);
     while (!listEmigrants.empty())
     {
-        std::cout << "Le mediateur va envoyer de " << listEmigrants.front().second  << " qui est " << table.getLeft()[listEmigrants.front().second] << std::endl;
+        //std::cout << "Le mediateur va envoyer de " << listEmigrants.front().second  << " qui est " << table.getLeft()[listEmigrants.front().second] << std::endl;
 
         unsigned id = table.getLeft()[listEmigrants.front().second];
         std::vector<unsigned> neighbors = topo.getIdNeighbors(id);
         eoPop<EOT> migPop = listEmigrants.front().first;
         for (unsigned neighbor : neighbors)
         {
-            std::cout << "On envoie à " << neighbor << std::endl;
+            //std::cout << "On envoie à " << neighbor << std::endl;
             sentMessages.push_back(std::thread(&AIsland<EOT>::update, table.getRight()[neighbor], migPop));
 		}    
         listEmigrants.pop();
diff --git a/smp/test/t-smpIsland.cpp b/smp/test/t-smpIsland.cpp
index 4468831e7..60ea34f8c 100644
--- a/smp/test/t-smpIsland.cpp
+++ b/smp/test/t-smpIsland.cpp
@@ -9,7 +9,7 @@ using namespace std;
 int main(void)
 {
     typedef struct {
-        unsigned popSize = 3;
+        unsigned popSize = 1000;
         unsigned tSize = 2;
         double pCross = 0.8;
         double pMut = 0.7;
@@ -87,8 +87,9 @@ int main(void)
         model.add(test);
         model.add(test2);
         
-        model();
-        
+        //model();
+        test();
+        test2();
         cout << test.getPop() << endl;
         cout << test2.getPop() << endl;
     }