Index: trunk/zoo-project/zoo-kernel/service_internal_python.c
===================================================================
--- trunk/zoo-project/zoo-kernel/service_internal_python.c	(revision 336)
+++ trunk/zoo-project/zoo-kernel/service_internal_python.c	(revision 337)
@@ -138,5 +138,5 @@
 	if(PyString_Check(trace)){
 	  char *tpbt=strdup(pbt);
-	  sprintf(pbt,"%s\n%s",tpbt,PyString_AsString(trace));
+	  sprintf(pbt,"%s\n%s\0",tpbt,PyString_AsString(trace));
 	  free(tpbt);
 	}