Index: trunk/src/plugins/rt_topo/crbs_route.c
===================================================================
--- trunk/src/plugins/rt_topo/crbs_route.c	(revision 1347)
+++ trunk/src/plugins/rt_topo/crbs_route.c	(revision 1348)
@@ -457,7 +457,8 @@
 	}
 
 	for(na = firsta; na != NULL; na = na->user_data)
-		grbs_path_realize(&crbs->grbs, crbs->routing_tn, na, 0);
+		if (grbs_path_realize(&crbs->grbs, crbs->routing_tn, na, 0) == NULL)
+			abort();
 
 	{
 		char tmp[128];