--- a/examples/simple-global-routing.cc	Mon Aug 06 10:09:18 2007 +0200
+++ b/examples/simple-global-routing.cc	Mon Aug 06 10:29:19 2007 +0200
@@ -178,4 +178,6 @@
   Simulator::Run ();
     
   Simulator::Destroy ();
+
+  return 0;
 }