diff --git a/hurricane/src/hurricane/UpdateSession.cpp b/hurricane/src/hurricane/UpdateSession.cpp
index ee0a6bdd..27192993 100644
--- a/hurricane/src/hurricane/UpdateSession.cpp
+++ b/hurricane/src/hurricane/UpdateSession.cpp
@@ -209,6 +209,16 @@ void UpdateSession::close()
   cdebug_log(18,0) << "UpdateSession::close() - Materialization completed." << endl;
 }
 
+void UpdateSession::reset()
+// ************************
+{
+  cdebug_log(18,1) << "UpdateSession::reset()" << endl;
+
+  while ( UPDATOR_STACK and not UPDATOR_STACK->empty() ) close();
+
+  cdebug_tabw(18,-1);
+}
+
 
 
 } // End of Hurricane namespace.
diff --git a/hurricane/src/hurricane/hurricane/UpdateSession.h b/hurricane/src/hurricane/hurricane/UpdateSession.h
index d5f159c6..22beb5e4 100644
--- a/hurricane/src/hurricane/hurricane/UpdateSession.h
+++ b/hurricane/src/hurricane/hurricane/UpdateSession.h
@@ -74,6 +74,7 @@ class UpdateSession : public SharedProperty {
 
     public: static void open();
     public: static void close();
+    public: static void reset();
 
 
 };
diff --git a/hurricane/src/viewer/ExceptionWidget.cpp b/hurricane/src/viewer/ExceptionWidget.cpp
index 3e2599b8..f2693aa4 100644
--- a/hurricane/src/viewer/ExceptionWidget.cpp
+++ b/hurricane/src/viewer/ExceptionWidget.cpp
@@ -32,6 +32,7 @@
 #include "hurricane/Error.h"
 #include "hurricane/Exception.h"
 #include "hurricane/TextTranslator.h"
+#include "hurricane/UpdateSession.h"
 #include "hurricane/viewer/Graphics.h"
 #include "hurricane/viewer/ExceptionWidget.h"
 
@@ -97,6 +98,8 @@ namespace Hurricane {
 
       ExceptionWidget::run( message );
     }
+    if (failure) UpdateSession::reset();
+
     return failure;
   }