Hello, everyone. I have just run into an interesting situation regarding ZClasses. Here's a description of my setup (using Zope 2.1.0): o ProductB contains a ZClass called BClass, which inherits from Folder. o BClass implements several DTML Methods. o ProductA contains a ZClass called AClass, which inherits from Folder. o AClass implements several DTML Methods, and needs to contain an instance of BClass as a method. Things went fine, until I tried to create the BClass instance in AClass's Methods tab. I get the following error: ----- Traceback (innermost last): File /d.local/zope/lib/python/ZPublisher/Publish.py, line 214, in publish_module File /d.local/zope/lib/python/ZPublisher/Publish.py, line 179, in publish File /d.local/zope/lib/python/Zope/__init__.py, line 202, in zpublisher_exception_hook (Object: RoleManager) File /d.local/zope/lib/python/ZPublisher/Publish.py, line 165, in publish File /d.local/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: BClass_add) File /d.local/zope/lib/python/ZPublisher/Publish.py, line 102, in call_object (Object: BClass_add) File /d.local/zope/lib/python/OFS/DTMLMethod.py, line 145, in __call__ (Object: BClass_add) File /d.local/zope/lib/python/DocumentTemplate/DT_String.py, line 502, in __call__ (Object: BClass_add) File /d.local/zope/lib/python/DocumentTemplate/DT_With.py, line 133, in render (Object: BClass.createInObjectManager(REQUEST['id'], REQUEST)) File /d.local/zope/lib/python/DocumentTemplate/DT_Util.py, line 335, in eval (Object: BClass.createInObjectManager(REQUEST['id'], REQUEST)) (Info: REQUEST) File <string>, line 0, in ? File /d.local/zope/lib/python/ZClasses/ZClass.py, line 454, in createInObjectManager (Object: BClass) AttributeError: (see above) ----- Running this through the debugger, I found that the error occurs when, on line 454 as noted in the traceback, the following line is executed in createInObjectManager: return getattr(folder, id) With the cursor sitting on this line in the debugger, I tried: pdb> p folder[id] <BClass instance at ...> pdb> s # this executes the getattr(folder, id) line AttributeError: 'binstance' It is obvious that my instance has been created, and installed into the methods instance via _setObject(), so I am baffled as to why folder[id] works but getattr(folder, id) does not. Can anyone shed any light on this, for me? Am I trying to do something that's outside the capabilities of ZClasses, or have I just missed something obvious? Thanks, --Jeff