diff --git a/src/NETGENPlugin/NETGENPlugin_Mesher.cxx b/src/NETGENPlugin/NETGENPlugin_Mesher.cxx
index 44535f2..2d9ff3b 100644
--- a/src/NETGENPlugin/NETGENPlugin_Mesher.cxx
+++ b/src/NETGENPlugin/NETGENPlugin_Mesher.cxx
@@ -599,6 +599,8 @@ void NETGENPlugin_Mesher::SetDefaultParameters()
   _fineness               = NETGENPlugin_Hypothesis::GetDefaultFineness();
   mparams.uselocalh       = NETGENPlugin_Hypothesis::GetDefaultSurfaceCurvature();
   netgen::merge_solids    = NETGENPlugin_Hypothesis::GetDefaultFuseEdges();
+  // Unused argument but set 0 to initialise it
+  mparams.elementorder = 0;
 
 #ifdef NETGEN_V6
 
@@ -612,6 +614,7 @@ void NETGENPlugin_Mesher::SetDefaultParameters()
 #endif
 }
 
+
 //=============================================================================
 /*!
  * Pass parameters to NETGEN
@@ -4496,6 +4499,9 @@ int NETGENPlugin_NetgenLibWrapper::GenerateMesh( netgen::OCCGeometry& occgeo,
   if ( !ngMesh )
     ngMesh = new netgen::Mesh;
 
+  // To dump mparam
+  // netgen::mparam.Print(std::cerr);
+
 #ifdef NETGEN_V6
 
   ngMesh->SetGeometry( shared_ptr<netgen::NetgenGeometry>( &occgeo, &NOOP_Deleter ));
diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
index d4712aa..8435688 100644
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
@@ -218,7 +218,7 @@ bool NETGENPlugin_NETGEN_3D::getSurfaceElements(
     SMESH_ProxyMesh::Ptr proxyMesh,
     NETGENPlugin_Internals &internals,
     SMESH_MesherHelper &helper,
-    std::map<const SMDS_MeshElement*, tuple<bool, bool>>& listElements
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
 )
 {
   SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
@@ -309,6 +309,8 @@ bool NETGENPlugin_NETGEN_3D::computeFillNgMesh(
     SMESH::Controls::TSequenceOfXYZ nodesCoords;
 
     // maps nodes to ng ID
+    // map must be sorted by ID to ensure that we will have the same number of
+    // 3D element if we recompute
     typedef map< const SMDS_MeshNode*, int, TIDCompare > TNodeToIDMap;
     typedef TNodeToIDMap::value_type                     TN2ID;
     TNodeToIDMap nodeToNetgenID;
@@ -338,7 +340,9 @@ bool NETGENPlugin_NETGEN_3D::computeFillNgMesh(
       proxyMesh.reset( Adaptor );
     }
 
-    std::map<const SMDS_MeshElement*, tuple<bool, bool>> listElements;
+    // map must be sorted by ID to ensure that we will have the same number of
+    // 3D element if we recompute
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare> listElements;
     bool ret = getSurfaceElements(aMesh, aShape, proxyMesh, internals, helper, listElements);
     if(ret)
       return ret;
diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.hxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.hxx
index af98746..f7ebf13 100644
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.hxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.hxx
@@ -107,7 +107,7 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D: public SMESH_3D_Algo
     SMESH_ProxyMesh::Ptr proxyMesh,
     NETGENPlugin_Internals &internals,
     SMESH_MesherHelper &helper,
-    std::map<const SMDS_MeshElement*, std::tuple<bool, bool>>& listElements);
+    std::map<const SMDS_MeshElement*, std::tuple<bool, bool>, TIDCompare>& listElements);
 
   bool compute(SMESH_Mesh&                          mesh,
                SMESH_MesherHelper&                  helper,
diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.cxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.cxx
index 1ea0ad7..39b809b 100644
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.cxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.cxx
@@ -322,7 +322,7 @@ bool NETGENPlugin_NETGEN_3D_SA::getSurfaceElements(
     SMESH_ProxyMesh::Ptr proxyMesh,
     NETGENPlugin_Internals &internals,
     SMESH_MesherHelper &helper,
-    std::map<const SMDS_MeshElement*, tuple<bool, bool>>& listElements
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
     )
 {
   // To remove compilation warnings
diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.hxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.hxx
index 0a6a6fc..dc7919d 100644
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.hxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D_SA.hxx
@@ -72,7 +72,7 @@ class NETGENPLUGIN_EXPORT NETGENPlugin_NETGEN_3D_SA: public NETGENPlugin_NETGEN_
     SMESH_ProxyMesh::Ptr proxyMesh,
     NETGENPlugin_Internals &internals,
     SMESH_MesherHelper &helper,
-    std::map<const SMDS_MeshElement*, tuple<bool, bool>>& listElements
+    std::map<const SMDS_MeshElement*, tuple<bool, bool>, TIDCompare>& listElements
     ) override;
 
    std::string _element_orientation_file="";