Hallo, my ZClass has as base-class Objectmanager and not Folder. When I try to add(let's call it PastaClass)programmatically PastaClass to an instance of Pastaclass I get a mistake.Adding it with the management-interface everythings o.k.Why?? Do I have to subclass folder?? Thanks. -- Sent through GMX FreeMail - http://www.gmx.net _______________________________________________ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )