Hi folks, I'm subclassing the BoboDictionary class from a while ago to do sessions (not versions, but tracking user sessions at the web site). I cannot assume cookies are available for my users, so I'm using a session code as part of the URL, e.g., localhost/sess/RQZ/someObject, where RQZ is the session ID. def __getitem__(self,key): # override this one function of BoboDictionary try: session = self.buffer[key] session.accessed() return session except: raise DMSessionMgrSessionExpired The problem I'm having is that when the session times out, my code raises a DMSessionMgrSessionExpired exception which I haven't figured out how to trap somewhere because it happens during Zope's untangling of the URL. I can't return a web page from this function (__getitem__()). I'd like it to show an explanatory (error) page to the user, with a link to login again. I could create a "dummy" session ID, which __getitem__() would return, and then all functional entry points would have to recognize that dummy ID and go to the error page. That's pretty painful. Is there a better approach I could take? And re. sessions in general -- is sessions support coming in Zope? I have code I could contribute along these lines if it would help. thanks! Michael