Index: source/ariba/overlay/BaseOverlay.cpp
===================================================================
--- source/ariba/overlay/BaseOverlay.cpp	(revision 6823)
+++ source/ariba/overlay/BaseOverlay.cpp	(revision 6824)
@@ -1669,5 +1669,6 @@
 
 	// inform listener
-	ldn->listener->onLinkUp( ldn->overlayId, ldn->remoteNode );
+	if(ldn != NULL && ldn->listener != NULL)
+		ldn->listener->onLinkUp( ldn->overlayId, ldn->remoteNode );
 
 	return true;