Dear All, I am trying to add session tracking to a Product of mine. I am trying to add a SessionDataManager to a Folderish object in the __init__ method of the class, but having troubles. I think I am importing everything: from Globals import HTMLFile from Globals import Persistent from Globals import default__class_init__ import Acquisition import AccessControl.Role import OFS.Folder from Products.ZCatalog import ZCatalog from Products.BTreeFolder import BTreeFolder from Products.CoreSessionTracking.SessionDataManager import SessionDataManager from Products.CoreSessionTracking.SessionDataContainer import SessionDataContainerMount from Products.CoreSessionTracking.SessionData import SessionData try: from Products.CoreSessionTracking.SessioningInterfaces import SessionDataManagerInterface except: # pre-2.3 Zopes don't have an Interfaces module class SessionDataManagerInterface: pass then in my __init__ method: ob = SessionDataManager( id='session_data_mgr', title='', path=None, timeout_mins=20) self._setObject('session_data_mgr', ob) However I get an attribute error when trying to add an intance of the product. _sdc not found. I have traced it using pdb, and from what I can find out it appears as if it fails in _setObject. More specifically SessionDataContainerMount seems to not returning the correct thing. I have tried tracing the normal addition of a SessionDataManager in Zope and it works fine. SessionDataContainerMount doesn't have an __init__ method, but it looks like when I add a S.D.M via the normal web interface __of__ gets called, but when my product tries to add it __del__ gets called. Any ideas? I am at the end of my Zope internals knowledge.... if there is anything else I can provide to help diagnose, let me know. TIA, Matt -- Matt Hamilton matth@netsight.co.uk Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Hosting | Web Design | Domain Names | Co-location | DB Integration