diff -Naur /dn47/SALOME/PRODUCTS/7x/opt/FEDORA.18.64/7.4.0/tmp/ParaView-4.1.0_SRC/ParaViewCore/ClientServerStream/vtkClientServerInterpreter.cxx /dn20/salome/rnv/PRODUCTS_BUILD/ParaView-4.1.0_SRC/ParaViewCore/ClientServerStream/vtkClientServerInterpreter.cxx
--- /dn47/SALOME/PRODUCTS/7x/opt/FEDORA.18.64/7.4.0/tmp/ParaView-4.1.0_SRC/ParaViewCore/ClientServerStream/vtkClientServerInterpreter.cxx	2014-01-11 17:59:57.000000000 +0400
+++ /dn20/salome/rnv/PRODUCTS_BUILD/ParaView-4.1.0_SRC/ParaViewCore/ClientServerStream/vtkClientServerInterpreter.cxx	2014-05-07 18:53:10.000000000 +0400
@@ -791,7 +791,9 @@
 {
   if(this->Internal->ClassToFunctionMap.count(cname))
     {
-    *this->LogStream << "Ignoring duplicate command function for " << cname << '\n';
+      if(this->LogStream) {
+	*this->LogStream << "Ignoring duplicate command function for " << cname << '\n';
+      }
     }
 
   vtkClientServerInterpreterInternals::ContextInformation* context = NULL;
@@ -848,6 +850,8 @@
 {
   if(this->Internal->NewInstanceFunctions.count(name))
     {
-    *this->LogStream << "Ignoring duplicate instance function for " << name << '\n';
+      if(this->LogStream) {
+	*this->LogStream << "Ignoring duplicate instance function for " << name << '\n';
+      }
     }
 
   vtkClientServerInterpreterInternals::ContextInformation* context = NULL;