Here's an example: 2010-08-26 22:49:01 ERROR txn.-1338986496 Failed to abort resource manager: <MultiObjectResourceAdapter for <ZODB.DB.TransactionalUndo object at 0x2d509f0> at 47516176> Traceback (most recent call last): File "transaction-1.1.0-py2.6.egg/transaction/_transaction.py", line 475, in abort rm.abort(self) File "transaction-1.1.0-py2.6.egg/transaction/_transaction.py", line 548, in abort self.manager.abort(o, txn) File "ZODB3-3.9.5-py2.6-macosx-10.3-fat.egg/ZODB/DB.py", line 985, in abort raise NotImplementedError NotImplementedError This used to give a meaningful error message. Anyone know why it no longer does? Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk