Hi *,
But somehow I have the feeling it has more to do with the 'and the container is not wrapped' part of the message. Not that I can make sense of it ;-)
Mmm, after even more searching, and not understanding I found http://www.mail-archive.com/zope-dev@zope.org/msg11438.html and changed my code to: def __of__(self, parent): '''foo''' if not hasattr(parent,'aq_base'): return self folder,id = self.remoteid.split(':') acl = parent.unrestrictedTraverse(folder) remote = acl.getUser(id) return Acquisition.ImplicitAcquisitionWrapper(aq_base(self), aq_base(remote).__of__(parent)) Now, this actually seems to work. If only I knew why.... Cheers, Joerg