I'm adding some RackMountable objects (subclassed from RackMountable and SimpleItem.Item) and when I try to access them via URL I get an AttributeError like they don't have attribute __of__: Traceback (innermost last): File /hd1/zope/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /hd1/zope/lib/python/ZPublisher/Publish.py, line 179, in publish File /hd1/zope/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: ElementWithAttributes) File /hd1/zope/lib/python/ZPublisher/Publish.py, line 151, in publish File /hd1/zope/lib/python/ZPublisher/BaseRequest.py, line 308, in traverse File /hd1/zope/lib/python/Products/ZPatterns/Specialists.py, line 27, in __bobo_traverse__ (Object: SheetProviderContainer) File /hd1/zope/lib/python/Products/ZPatterns/Specialists.py, line 39, in getItem (Object: SheetProviderContainer) File /hd1/zope/lib/python/Products/ZPatterns/Rack.py, line 515, in __get_attr__ (Object: cheese4) AttributeError: __of__ What am I doing wrong here? -- Itamar S.T. itamar@maxnm.com