diff --git a/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx b/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx
index 7aa1df339..714ccc3f5 100644
--- a/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx
+++ b/src/GEOMToolsGUI/GEOMToolsGUI_1.cxx
@@ -469,31 +469,42 @@ void GEOMToolsGUI::OnNbIsos()
     aSelMgr->selectedObjects( selected );
     if ( selected.IsEmpty() )
       return;
-    
-    Handle(SALOME_InteractiveObject) FirstIOS =  selected.First();
-    if ( FirstIOS.IsNull() )
-      return;
-    
+
     SVTK_ViewWindow* vtkVW = dynamic_cast<SVTK_ViewWindow*>( window );
     if ( !vtkVW )
       return;
+
+    SALOME_View* view = GEOM_Displayer::GetActiveView();
+
+    vtkActorCollection* aCollection = vtkActorCollection::New();
     
-    SVTK_View* aView = vtkVW->getView();
-    vtkActorCollection* aCollection = aView->getRenderer()->GetActors();
-    
+    for ( SALOME_ListIteratorOfListIO It( selected ); It.More(); It.Next() ) {
+      Handle(SALOME_InteractiveObject) anIObject = It.Value();
+      SALOME_Prs* aPrs = view->CreatePrs( anIObject->getEntry() ); 
+      SVTK_Prs* vtkPrs = dynamic_cast<SVTK_Prs*>( aPrs );
+      if ( vtkPrs ) {
+	vtkActorCollection* anActors = vtkPrs->GetObjects();
+	anActors->InitTraversal();
+	vtkActor* anAct = anActors->GetNextActor();
+	aCollection->AddItem(anAct);
+      }
+    }
+  
+    if(aCollection)
+      aCollection->InitTraversal();
+    else
+      return;
+   
     int UIso = 0;
     int VIso = 0;
-    if(aCollection){
-      aCollection->InitTraversal();
-    }
     
-    vtkActor *anAct = aCollection->GetNextActor();
-    if(GEOM_Actor *anActor = dynamic_cast<GEOM_Actor*>(anAct)){
+    vtkActor* anAct = aCollection->GetNextActor();
+    if (GEOM_Actor* anActor = GEOM_Actor::SafeDownCast(anAct))
       anActor->GetNbIsos(UIso,VIso);
-    }
+    else
+      return;
     
-    
-    GEOMToolsGUI_NbIsosDlg * NbIsosDlg =
+    GEOMToolsGUI_NbIsosDlg* NbIsosDlg =
       new GEOMToolsGUI_NbIsosDlg( SUIT_Session::session()->activeApplication()->desktop() );
     
     NbIsosDlg->setU( UIso );
@@ -502,14 +513,15 @@ void GEOMToolsGUI::OnNbIsos()
     if ( NbIsosDlg->exec() ) {
       SUIT_OverrideCursor();
       
-      while(anAct = aCollection->GetNextActor()) {
-	if(GEOM_Actor *anActor = dynamic_cast<GEOM_Actor*>(anAct)){
+      while( anAct!=NULL ) {
+	if(GEOM_Actor* anActor = GEOM_Actor::SafeDownCast(anAct)){
 	  // There are no casting to needed actor.
 	  UIso = NbIsosDlg->getU();
 	  VIso = NbIsosDlg->getV();
 	  int aIsos[2]={UIso,VIso};
 	  anActor->SetNbIsos(aIsos);
 	}
+	anAct = aCollection->GetNextActor();
       }
     }
   } // end vtkviewer
diff --git a/src/OBJECT/GEOM_Actor.cxx b/src/OBJECT/GEOM_Actor.cxx
index 54c88608e..4bc733201 100644
--- a/src/OBJECT/GEOM_Actor.cxx
+++ b/src/OBJECT/GEOM_Actor.cxx
@@ -67,6 +67,8 @@
 #include <vtkMath.h>
 #include <vtkCamera.h>
 
+#include "utilities.h"
+
 //vtkStandardNewMacro(GEOM_Actor);
 
 #ifndef MYDEBUG
@@ -105,7 +107,7 @@ GEOM_Actor::GEOM_Actor():
   
 { 
 #ifdef MYDEBUG
-  cout <<this<< " GEOM_Actor::GEOM_Actor"<<endl;
+  MESSAGE (this<< " GEOM_Actor::GEOM_Actor");
 #endif
 
   myPolyDataMapper->SetInput(myAppendFilter->GetOutput()); 
@@ -180,7 +182,7 @@ GEOM_Actor::GEOM_Actor():
 GEOM_Actor::~GEOM_Actor() 
 { 
 #ifdef MYDEBUG
-  cout <<this<< " ~GEOM_Actor::GEOM_Actor"<<endl;
+  MESSAGE (this<< " ~GEOM_Actor::GEOM_Actor");
 #endif
   myHighlightProp->Delete();
   myPreHighlightProp->Delete();
@@ -199,7 +201,7 @@ New()
  
 void Write(vtkPolyData* theDataSet, const char* theFileName){ 
   vtkPolyDataWriter* aWriter = vtkPolyDataWriter::New(); 
-  cout<<"Write - "<<theFileName<<"' : "<<theDataSet->GetNumberOfPoints()<<"; "<<theDataSet->GetNumberOfCells()<<endl; 
+  MESSAGE ("Write - "<<theFileName<<"' : "<<theDataSet->GetNumberOfPoints()<<"; "<<theDataSet->GetNumberOfCells()); 
   aWriter->SetInput(theDataSet); 
   aWriter->SetFileName(theFileName); 
   //aWriter->Write(); 
@@ -275,7 +277,7 @@ GEOM_Actor::
 setDisplayMode(int theMode) 
 { 
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SetDisplayMode = "<<theMode  <<endl;
+  MESSAGE ( "GEOM_Actor::SetDisplayMode = "<<theMode );
 #endif
   VTKViewer_Actor::setDisplayMode(theMode);
   SetVisibility(GetVisibility()); 
@@ -286,7 +288,7 @@ GEOM_Actor::
 SetSelected(bool theIsSelected) 
 { 
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SetSelected = "<<theIsSelected  <<endl;
+  MESSAGE ( "GEOM_Actor::SetSelected = "<<theIsSelected  );
 #endif
 
   myIsSelected = theIsSelected; 
@@ -298,8 +300,8 @@ GEOM_Actor::
 SetVisibility(int theVisibility) 
 { 
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SetVisibility = "<<theVisibility <<"  myIsSelected="<< myIsSelected
-       << " theVisibility="<<theVisibility<<" myIsPreselected="<<myIsPreselected<<endl;
+  MESSAGE ( "GEOM_Actor::SetVisibility = "<<theVisibility <<"  myIsSelected="<< myIsSelected
+         << " theVisibility="<<theVisibility<<" myIsPreselected="<<myIsPreselected );
 #endif
 
   SALOME_Actor::SetVisibility(theVisibility);
@@ -313,7 +315,8 @@ SetVisibility(int theVisibility)
   myOneFaceEdgeActor->SetVisibility(theVisibility && myDisplayMode == (int)eWireframe && !myIsSelected);
   myIsolatedEdgeActor->SetVisibility(theVisibility && !myIsSelected);
 
-  myVertexActor->SetVisibility(false);// must be added new mode points 
+//  myVertexActor->SetVisibility(false);// must be added new mode points 
+  myVertexActor->SetVisibility(theVisibility);
 }
  
 
@@ -321,16 +324,14 @@ void
 GEOM_Actor
 ::SetNbIsos(const int theNb[2])
 {
-  myNbIsos[0] = theNb[0];
-  myNbIsos[1] = theNb[1];
+  myWireframeFaceSource->SetNbIso(theNb);
 }
 
 void
 GEOM_Actor
 ::GetNbIsos(int &theNbU,int &theNbV)
 {
-  theNbU = myNbIsos[0];
-  theNbV = myNbIsos[1];
+  myWireframeFaceSource->GetNbIso(theNbU, theNbV);
 }
 
 static 
@@ -465,7 +466,7 @@ void GEOM_Actor::SetShape (const TopoDS_Shape& theShape,
 // OLD METHODS
 void GEOM_Actor::setDeflection(double adef) {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::setDeflection"<<endl;
+  MESSAGE ( "GEOM_Actor::setDeflection" );
 #endif
   SetDeflection((float)adef,GetIsRelative());
 }
@@ -479,7 +480,7 @@ void GEOM_Actor::setDeflection(double adef) {
 void GEOM_Actor::SetHighlightProperty(vtkProperty* Prop)
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SetHighlightProperty"<<endl;
+  MESSAGE ( "GEOM_Actor::SetHighlightProperty" );
 #endif
   this->myHighlightActor->GetProperty()->DeepCopy(Prop);
   
@@ -488,7 +489,7 @@ void GEOM_Actor::SetHighlightProperty(vtkProperty* Prop)
 void GEOM_Actor::SetWireframeProperty(vtkProperty* Prop)
 {
 #ifdef MYDEBUG
-  cout << this << " GEOM_Actor::SetWireframeProperty"<<endl;
+  MESSAGE ( this << " GEOM_Actor::SetWireframeProperty" );
 #endif
   // must be filled
   myWireframeFaceActor->SetProperty(Prop);
@@ -497,7 +498,7 @@ void GEOM_Actor::SetWireframeProperty(vtkProperty* Prop)
 void GEOM_Actor::SetShadingProperty(vtkProperty* Prop)
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SetShadingProperty"<<endl;
+  MESSAGE ( "GEOM_Actor::SetShadingProperty" );
 #endif
   myShadingFaceProp->DeepCopy(Prop);
 }
@@ -506,7 +507,7 @@ void GEOM_Actor::SetShadingProperty(vtkProperty* Prop)
 void GEOM_Actor::Render(vtkRenderer *ren, vtkMapper *theMapper)
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::Render"<<endl;
+  MESSAGE ( "GEOM_Actor::Render" );
 #endif
 
   if(!GetVisibility())
@@ -578,7 +579,7 @@ void GEOM_Actor::Render(vtkRenderer *ren, vtkMapper *theMapper)
 void GEOM_Actor::ReleaseGraphicsResources(vtkWindow *)
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::ReleaseGraphicsResources"<<endl;
+  MESSAGE ( "GEOM_Actor::ReleaseGraphicsResources" );
 #endif  
 }
 
@@ -587,7 +588,7 @@ void GEOM_Actor::ReleaseGraphicsResources(vtkWindow *)
 void GEOM_Actor::ShallowCopy(vtkProp *prop)
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::ShallowCopy"<<endl;
+  MESSAGE ( "GEOM_Actor::ShallowCopy" );
 #endif
   GEOM_Actor *f = GEOM_Actor::SafeDownCast(prop);
   if ( f != NULL )
@@ -601,7 +602,7 @@ void GEOM_Actor::ShallowCopy(vtkProp *prop)
 
 const TopoDS_Shape& GEOM_Actor::getTopo() {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::getTopo"<<endl;
+  MESSAGE ( "GEOM_Actor::getTopo" );
 #endif
   return myShape;
 }
@@ -610,14 +611,14 @@ void GEOM_Actor::setInputShape(const TopoDS_Shape& ashape, double adef1,
                                int imode, bool isVector)
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::setInputShape"<<endl;
+  MESSAGE ( "GEOM_Actor::setInputShape" );
 #endif
 }
 
 double GEOM_Actor::getDeflection()
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::getDeflection"<<endl;
+  MESSAGE ( "GEOM_Actor::getDeflection" );
 #endif
   return (double) GetDeflection();
 }
@@ -626,7 +627,7 @@ double GEOM_Actor::getDeflection()
 double GEOM_Actor::isVector()
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::isVector"<<endl;
+  MESSAGE ( "GEOM_Actor::isVector" );
 #endif  
   return 0;
 }
@@ -634,21 +635,21 @@ double GEOM_Actor::isVector()
 void GEOM_Actor::SubShapeOn()
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SubShapeOn"<<endl;
+  MESSAGE ( "GEOM_Actor::SubShapeOn" );
 #endif  
 }
 
 void GEOM_Actor::SubShapeOff()
 {
 #ifdef MYDEBUG
-  cout << "GEOM_Actor::SubShapeOff"<<endl;
+  MESSAGE ( "GEOM_Actor::SubShapeOff" );
 #endif
 }
 
 void GEOM_Actor::highlight(bool highlight)
 {
 #ifdef MYDEBUG
-  cout << this << " GEOM_Actor::highlight highlight="<<highlight<<endl;
+  MESSAGE ( this << " GEOM_Actor::highlight highlight="<<highlight );
 #endif
   SALOME_Actor::highlight(highlight);
 }
@@ -701,7 +702,7 @@ GEOM_Actor
 {
   myIsSelected = theIsHighlight;
 #ifdef MYDEBUG
-  cout << this << " GEOM_Actor::Highlight myIsSelected="<<myIsSelected<<endl;
+  MESSAGE ( this << " GEOM_Actor::Highlight myIsSelected="<<myIsSelected );
 #endif
   
   SALOME_Actor::Highlight(theIsHighlight); // this method call ::highlight(theIsHighlight) in the end
@@ -718,7 +719,7 @@ GEOM_Actor
 	       bool theIsHighlight)
 {
 #ifdef MYDEBUG
-  cout << this<<" GEOM_Actor::PreHighlight (3) theIsHighlight="<<theIsHighlight<<endl;
+  MESSAGE ( this<<" GEOM_Actor::PreHighlight (3) theIsHighlight="<<theIsHighlight );
 #endif
 
   if ( !GetPickable() )
@@ -763,7 +764,7 @@ GEOM_Actor
 {
   // define the selection of object
 #ifdef MYDEBUG
-  cout << endl << this << " GEOM_Actor::Highlight (3) myIsSelected="<<myIsSelected<<endl;
+  MESSAGE ( std::endl << this << " GEOM_Actor::Highlight (3) myIsSelected="<<myIsSelected );
 #endif
   bool aRet = SALOME_Actor::Highlight(theInteractorStyle,theSelectionEvent,theIsHighlight);
   SetSelected(theIsHighlight);
diff --git a/src/OBJECT/GEOM_WireframeFace.cxx b/src/OBJECT/GEOM_WireframeFace.cxx
index 8d49a177c..26f6cb92a 100755
--- a/src/OBJECT/GEOM_WireframeFace.cxx
+++ b/src/OBJECT/GEOM_WireframeFace.cxx
@@ -32,9 +32,10 @@
 vtkStandardNewMacro(GEOM_WireframeFace);
  
 GEOM_WireframeFace::GEOM_WireframeFace(): 
-  NbIso(1), 
-  Discret(15) 
+  Discret(15)
 { 
+  NbIso[0] = 1;
+  NbIso[1] = 1;
 } 
  
 GEOM_WireframeFace::~GEOM_WireframeFace() 
@@ -58,12 +59,29 @@ Execute()
   }
 }
 
+void GEOM_WireframeFace::SetNbIso(const int theNb[2])
+{
+  if ( theNb[0] == NbIso[0] && theNb[1] == NbIso[1])
+    return;
+
+  NbIso[0] = theNb[0];
+  NbIso[1] = theNb[1];
+
+  Modified();
+}
+
+void GEOM_WireframeFace::GetNbIso(int &theNbU,int &theNbV)
+{
+  theNbU = NbIso[0];
+  theNbV = NbIso[1];
+}
+
 void  
 GEOM_WireframeFace:: 
 OCC2VTK(const TopoDS_Face& theFace,
         vtkPolyData* thePolyData,
 		    vtkPoints* thePts,  
-        const int theNbIso, 
+        const int theNbIso[2], 
         const int theDiscret) 
 { 
   TopoDS_Face aFace = theFace; 
@@ -74,7 +92,7 @@ OCC2VTK(const TopoDS_Face& theFace,
 void 
 GEOM_WireframeFace:: 
 CreateIso(const TopoDS_Face& theFace,
-	        const int theNbIso, 
+	  const int theNbIso[2], 
           const int theDiscret, 
           vtkPolyData* thePolyData,
           vtkPoints* thePts)
@@ -95,8 +113,8 @@ CreateIso(const TopoDS_Face& theFace,
 				     Standard_False);
   
   Standard_Real anUMin, anUMax, aVMin, aVMax;
-  TColStd_Array1OfReal anUPrm(1, theNbIso), aVPrm(1, theNbIso);
-  TColStd_Array1OfInteger anUInd(1, theNbIso), aVInd(1, theNbIso);
+  TColStd_Array1OfReal anUPrm(1, theNbIso[0]), aVPrm(1, theNbIso[1]);
+  TColStd_Array1OfInteger anUInd(1, theNbIso[0]), aVInd(1, theNbIso[1]);
 
   anUInd.Init(0);
   aVInd.Init(0);
@@ -185,11 +203,11 @@ CreateIso(const TopoDS_Face& theFace,
   Standard_Real confusion = Min(DeltaU, DeltaV) * HATHCER_CONFUSION_3D ;
   aHatcher.Confusion3d (confusion) ;
 
-  Standard_Real StepU = DeltaU / (Standard_Real)theNbIso;
+  Standard_Real StepU = DeltaU / (Standard_Real)theNbIso[0];
   if(StepU > confusion){
     Standard_Real UPrm = anUMin + StepU / 2.;
     gp_Dir2d Dir(0., 1.) ;
-    for(IIso = 1 ; IIso <= theNbIso ; IIso++) {
+    for(IIso = 1 ; IIso <= theNbIso[0] ; IIso++) {
       anUPrm(IIso) = UPrm ;
       gp_Pnt2d Ori (UPrm, 0.) ;
       Geom2dAdaptor_Curve HCur (new Geom2d_Line (Ori, Dir)) ;
@@ -198,11 +216,11 @@ CreateIso(const TopoDS_Face& theFace,
     }
   }
 
-  Standard_Real StepV = DeltaV / (Standard_Real) theNbIso ;
+  Standard_Real StepV = DeltaV / (Standard_Real) theNbIso[1] ;
   if(StepV > confusion){
     Standard_Real VPrm = aVMin + StepV / 2.;
     gp_Dir2d Dir(1., 0.);
-    for(IIso = 1 ; IIso <= theNbIso ; IIso++){
+    for(IIso = 1 ; IIso <= theNbIso[1] ; IIso++){
       aVPrm(IIso) = VPrm;
       gp_Pnt2d Ori (0., VPrm);
       Geom2dAdaptor_Curve HCur(new Geom2d_Line (Ori, Dir));
@@ -217,9 +235,9 @@ CreateIso(const TopoDS_Face& theFace,
   aHatcher.Trim() ;
 
   Standard_Integer aNbDom = 0 ; // for debug purpose
-  for(IIso = 1 ; IIso <= theNbIso ; IIso++){
-    Standard_Integer Index ;
+  Standard_Integer Index ;
 
+  for(IIso = 1 ; IIso <= theNbIso[0] ; IIso++){
     Index = anUInd(IIso) ;
     if(Index != 0){
       if(aHatcher.TrimDone(Index) && !aHatcher.TrimFailed(Index)){
@@ -228,7 +246,9 @@ CreateIso(const TopoDS_Face& theFace,
           aNbDom = aHatcher.NbDomains (Index);
       }
     }
+  }
 
+  for(IIso = 1 ; IIso <= theNbIso[1] ; IIso++){
     Index = aVInd(IIso);
     if(Index != 0){
       if(aHatcher.TrimDone (Index) && !aHatcher.TrimFailed(Index)){
@@ -463,4 +483,4 @@ CreateIso__(const BRepAdaptor_Surface& theSurface,
       CreateIso__(theSurface, theIsoType, aLocalU , theV, theStep/2, thePolyData, thePts);
     }
   }
-}
\ No newline at end of file
+}
diff --git a/src/OBJECT/GEOM_WireframeFace.h b/src/OBJECT/GEOM_WireframeFace.h
index cdbe122b3..eda41103c 100755
--- a/src/OBJECT/GEOM_WireframeFace.h
+++ b/src/OBJECT/GEOM_WireframeFace.h
@@ -15,8 +15,8 @@ public:
   vtkTypeMacro(GEOM_WireframeFace,GEOM_FaceSource); 
   static GEOM_WireframeFace* New(); 
  
-  vtkSetMacro(NbIso,int); 
-  vtkGetMacro(NbIso,int); 
+  /*  vtkSetMacro(NbIso,int); 
+      vtkGetMacro(NbIso,int);*/
  
   vtkSetMacro(Discret,int); 
   vtkGetMacro(Discret,int); 
@@ -25,16 +25,22 @@ public:
   void OCC2VTK(const TopoDS_Face& theFace,  
                vtkPolyData* thePolyData, 
                vtkPoints* thePts, 
-               int theNbIso = 1, 
-               int theDiscret = 15); 
- 
+               const int theNbIso[2], 
+               const int theDiscret = 15);
+
+  //! IsoLines management
+  // theNb[0] - number of U lines
+  // theNb[1] - number of V lines
+  virtual void SetNbIso(const int theNb[2]);
+  virtual void GetNbIso(int &theNbU,int &theNbV);
+
 protected: 
-  int NbIso, Discret; 
+  int NbIso[2], Discret; 
  
   static  
   void 
   CreateIso(const TopoDS_Face& theFace,
-	          const int theNbIso, 
+	    const int theNbIso[2], 
             const int theDiscret, 
             vtkPolyData* thePolyData,
             vtkPoints* thePts);