It seems that there may still be some strangeness with Transience. We're running Zope-2.7.1b1 (Python 2.3.3, Fedora Core 1) and after using the system for a day or two, it got the following error on a page that accesses the SESSION: Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module OFS.DTMLDocument, line 128, in __call__ - <DTMLDocument instance at 9e684350> -URL: http://george/login/root/ChooseAccount/chooseAccount/manage_main - Physical Path: /login/root/ChooseAccount/chooseAccount Module DocumentTemplate.DT_String, line 474, in __call__ Module DocumentTemplate.DT_With, line 76, in render Module DocumentTemplate.DT_In, line 703, in renderwob Module DocumentTemplate.DT_Let, line 76, in render Module DocumentTemplate.DT_Util, line 198, in eval - __traceback_info__: value Module <string>, line 1, in <expression> NameError: name 'SESSION' is not defined It doesn't appear to be a problem accessing a variable in the SESSION, but finding "SESSION" itself. So, I hook-up to the ZMI and click on *temp_folder*, then click on *session_data (Session Data Container)* and I get the following error: Traceback (innermost last): Module ZPublisher.Publish, line 101, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 39, in call_object Module App.special_dtml, line 62, in __call__ Module DocumentTemplate.DT_String, line 474, in __call__ Module Products.Transience.Transience, line 709, in nudge Module Products.Transience.Transience, line 555, in _gc RuntimeError: the bucket being iterated changed size The same thing happened yesterday and re-starting Zope seemed to get things working again. After the problem yesterday, I changed my temp database to use filestorage to see if that would help. No luck, the problem showed up again today. I have not restarted Zope again today, so my system is still in the "screwed-up" state. Chris, if you'd like, I can probably get you access to the system if there is anything to be learned from it in its current state. Thanks, Steve