Hello, im just learning zope and python and find it difficult to get the details of aquisition and inheritance. I have the following problem: (FS product) My base class has an attribute manage_editSettingsForm In its __init__ method I instantiate a contoller class. In the methods of the controller class can access self.manage_edtiSettingsForm (fine) Now I instantiate a importSingle class in a method of the controller class. In the methods of the importSingle class I cannot access self.manage_edtiSettingsForm (why?) Controller class: from Acquisition import Implicit from Globals import InitializeClass, Persistent from Products.PythonScripts.Utility import allow_class, allow_module from AccessControl import ClassSecurityInfo from OFS.SimpleItem import SimpleItem from OFS.ObjectManager import ObjectManager from Products.BTreeFolder2.BTreeFolder2 import BTreeFolder2 from Lasttest import Lasttest import sys, os, urllib, commands, re, types import LTimport allow_module=('Controller') class Controller(Implicit,ObjectManager, SimpleItem): --------------------- importSingle Class: from Globals import InitializeClass from Acquisition import Implicit import os,re class importSingle(Implicit): I tried subclassing form SimpleItem and ObjectManager but it didn't work. What is required that inheritance will work? Greetings Roman