I posed this same question yesterday, and thought I would have heard something already given the severity of the problem. When I went to save the version I've been working in, I got: Zope Error Zope has encountered an error while publishing this resource. Error Type: KeyError Error Value: ~ -------------------------------------------------------------------------------- Here's the traceback: Traceback (innermost last): File /usr/local/zope/Zope-2.1.0-src/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /usr/local/zope/Zope-2.1.0-src/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/local/zope/Zope-2.1.0-src/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: RoleManager) File /usr/local/zope/Zope-2.1.0-src/lib/python/ZPublisher/Publish.py, line 169, in publish File /usr/local/zope/Zope-2.1.0-src/lib/python/ZODB/Transaction.py, line 237, in commit File /usr/local/zope/Zope-2.1.0-src/lib/python/ZODB/DB.py, line 576, in commit File /usr/local/zope/Zope-2.1.0-src/lib/python/ZODB/FileStorage.py, line 480, in commitVersion (Object: /usr/local/zope/Zope-2.1.0-src/var/Data.fs) KeyError: (see above) To state the obvious, I'm running Zope 2.1.0 compiled from the source. I have retried the version save operation numerous times, with no success. Yesterday, the error value it was giving me for the KeyError was ' ~', today it is ' G'(there is a little box character just before the G, I'm not sure if the cut & paste will make it show up or not). The machine was rebooted last night, which might account for the change in the error value. So, is my database corrupt (that's my first I-know-nothing-about-Zope-internals guess)? How did it get that way? More importantly, what can I do to fix it, and will it happen again? As for what's changed in the version, an easier answered question would be 'what hasn't changed?' As I've been learning the ins and outs of Zope, I've created/destroyed/renamed/copied/pasted/recreated classes, DTML methods, MySQL querries, etc. I've really been pushing this thing to see how to get done what I need to do (that's how I learn). Again, thanks in advance for any suggestions.