Stange problem I can't figure out... I have a Zope installation for my site. It works fine, except I can't add a Zclass to a product. I've followed the developers guide tutorial and... 1. create a product 2. create a simple zclass inside that product (following the tutorial exactly) When I try to add the zclass, I always get this error: <!-- Traceback (innermost last): File /usr/local/lib/Zope/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /usr/local/lib/Zope/lib/python/ZPublisher/Publish.py, line 179, in publish File /usr/local/lib/Zope/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /usr/local/lib/Zope/lib/python/ZPublisher/Publish.py, line 165, in publish File /usr/local/lib/Zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_addZClass) File /usr/local/lib/Zope/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: manage_addZClass) File /usr/local/lib/Zope/lib/python/ZClasses/ZClass.py, line 141, in manage_addZClass (Object: ElementWithAttributes) File /usr/local/lib/Zope/lib/python/OFS/ObjectManager.py, line 232, in _setObject (Object: ElementWithAttributes) File /usr/local/lib/Zope/lib/python/ZClasses/ZClass.py, line 412, in manage_afterAdd (Object: testclass) File /usr/local/lib/Zope/lib/python/ZClasses/ZClass.py, line 373, in _register (Object: testclass) File /usr/local/lib/Zope/lib/python/ZODB/Connection.py, line 396, in setstate File /usr/local/lib/Zope/lib/python/ZODB/Connection.py, line 205, in _persistent_load (Info: > I've done a fresh install (just moving over my Extensions and Data.fs), with no help. I've tried creating a ZClass on a fresh install (using the exact same steps, but with a fresh Data.fs and no Extension) and it works fine. What could the problem be? Thanks in advance for any help. --- John Eikenberry [jae@kavi.com - http://zhar.net/] ______________________________________________________________ "A society that will trade a little liberty for a little order will deserve neither and lose both." --B. Franklin