Index: trunk/packages/sipb-xen-www/code/main.py
===================================================================
--- trunk/packages/sipb-xen-www/code/main.py	(revision 606)
+++ trunk/packages/sipb-xen-www/code/main.py	(revision 607)
@@ -467,5 +467,5 @@
 def badOperation(u, s, e):
     """Function called when accessing an unknown URI."""
-    raise CodeError("Unknown operation")
+    return ({'Status': '404 Not Found'}, 'Invalid operation.')
 
 def infoDict(username, state, machine):