Hi. I use the standalone ZODB. When I create persistent objects containing _v_ (volatile attributes), and access them at an extremely high rate(reading and using), they sometimes lose their _v_ attibutes. This occures at random intervals, and can be reproduced. After a few seconds of operation, I suddenly get an error like: ============================================================ Traceback (most recent call last): File "C:\Development\Module.py", line 220, in remPacket self._v_messages.loopMembersWithIds(packet.getMessageIds(), self._delivered) AttributeError: _v_messages ============================================================ The object containing the _v_messages worked fine prior to the error. Can somebody tell me what I need to do the avoid this? Herman. == Download ringtones, logos and picture messages at Ananzi Mobile Fun. http://www.ananzi.co.za/cgi-bin/goto.pl?mobile