fix 2

Post/PViewDataListIO.cpp

@@ -577,6 +577,7 @@ bool PViewDataList::writeMSH(const std::string &fileName, double version, bool b
     if(!pos.insert(vertices[i]))
       unique.push_back(vertices[i]);
   }
+  vertices.clear();
 
   std::map<MVertex *, nodeData> vertexData;
 
@@ -654,9 +655,8 @@ bool PViewDataList::writeMSH(const std::string &fileName, double version, bool b
       fprintf(fp, "3\n%d\n%d\n%d\n", ts, numComponents, size);
 
     if(forceNodeData){
-      for(unsigned int i = 0; i < vertices.size(); i++){
-        MVertex *v = vertices[i];
-        if(v->getIndex() > 0){
+      for(unsigned int i = 0; i < unique.size(); i++){
+        MVertex *v = unique[i];
         fprintf(fp, "%d", v->getIndex());
         int nbnod = vertexData[v].nbnod;
         int nod = vertexData[v].nod;
@@ -666,7 +666,6 @@ bool PViewDataList::writeMSH(const std::string &fileName, double version, bool b
                   d[numComponents * nbnod * ts + numComponents * nod + j]);
         fprintf(fp, "\n");
       }
-      }
       fprintf(fp, "$EndNodeData\n");
     }
     else{