diff --git a/katana/src/KatanaEngine.cpp b/katana/src/KatanaEngine.cpp
index 3aaf36cc..ff0c63c7 100644
--- a/katana/src/KatanaEngine.cpp
+++ b/katana/src/KatanaEngine.cpp
@@ -675,7 +675,7 @@ namespace Katana {
       }
       _routingPlanes.clear();
 
-      for ( auto symmetric : _symmetrics ) delete symmetric.second;
+    //for ( auto symmetric : _symmetrics ) delete symmetric.second;
       _symmetrics.clear();
 
       Session::close();