Index: source/ariba/overlay/BaseOverlay.cpp
===================================================================
--- source/ariba/overlay/BaseOverlay.cpp	(revision 5776)
+++ source/ariba/overlay/BaseOverlay.cpp	(revision 5777)
@@ -1155,5 +1155,5 @@
 			// delegate data message
 			listener->onMessage( overlayMsg,
-				overlayMsg->getSourceNode(), ld->overlayId );
+				overlayMsg->getSourceNode(), ld==NULL ? LinkID::UNSPECIFIED : ld->overlayId );
 
 			ret = true;