From 764f4f5a919871f157c5b1678854e97aa8e919c7 Mon Sep 17 00:00:00 2001
From: Martin Quinson <martin.quinson@loria.fr>
Date: Mon, 26 Jan 2015 00:26:52 +0100
Subject: [PATCH] more informative (?) error message

---
 src/surf/surf_routing_cluster.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/surf/surf_routing_cluster.cpp b/src/surf/surf_routing_cluster.cpp
index 25cf788bdd..02c11ba7b1 100644
--- a/src/surf/surf_routing_cluster.cpp
+++ b/src/surf/surf_routing_cluster.cpp
@@ -90,7 +90,7 @@ void AsCluster::getGraph(xbt_graph_t graph, xbt_dict_t nodes, xbt_dict_t edges)
   xbt_node_t current, previous, backboneNode = NULL, routerNode;
   s_surf_parsing_link_up_down_t info;
 
-  xbt_assert(p_router,"Malformed cluster");
+  xbt_assert(p_router,"Malformed cluster. This may be because your platform file is a hypergraph while it must be a graph.");
 
   /* create the router */
   char *link_name = p_router->getName();
-- 
2.20.1