diff --git a/src/SMESHGUI/SMESHGUI_ComputeDlg.cxx b/src/SMESHGUI/SMESHGUI_ComputeDlg.cxx
index f84027be1..6844cdea9 100644
--- a/src/SMESHGUI/SMESHGUI_ComputeDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_ComputeDlg.cxx
@@ -2229,7 +2229,9 @@ void SMESHGUI_BaseComputeOp::evaluateMesh()
     SUIT_OverrideCursor aWaitCursor;
     try {
       OCC_CATCH_SIGNALS;
-      aRes = gen->Evaluate(myMesh, myMainShape);
+      SMESH::long_array_var tmp = gen->Evaluate(myMesh, myMainShape);
+      for ( int i = 0; i < tmp->length(); ++i)
+        aRes[ i ] = tmp [ i ];
     }
     catch(const SALOME::SALOME_Exception & S_ex){
       memoryLack = true;