--- a/server/session.py	Thu Oct 21 18:38:36 2010 +0200
+++ b/server/session.py	Fri Oct 22 09:15:35 2010 +0200
@@ -28,6 +28,7 @@
 from warnings import warn
 
 from logilab.common.deprecation import deprecated
+from rql import CoercionError
 from rql.nodes import ETYPE_PYOBJ_MAP, etype_from_pyobj
 from yams import BASE_TYPES