Hi, I have a strange problem with my ZClass. We have built a layout system, where pages (a ZClass) contain components (another ZClass) of different types (header, text...); the code for adding, changing and displaying the components is stored in templates (which are DTML Methods and _not_ part of the component object but stored in an ordinary, acquisited folder). However, since I condensed the code to simply tell each component to render itself, I get an error when I try to modify the component via the interface. I tracked it down to common.manage_changeProperties, which throws an AttributeError, error value: getOwner. Base classes of the component ZClass: ZObject, CatalogAwareBase, ZObjectManager Python method 'render': ## Script (Python) "render" ##bind container=container ##bind context=context ##bind namespace= ##bind script=script ##bind subpath=traverse_subpath ##parameters= ##title=gibt das gerenderte Template zurück ## from Products.PythonScripts.standard import DTML request = context.REQUEST response = request.RESPONSE print '<!-- Methode: render (acComponent %s; DEBUG) ... -->' % \ container.title_and_id() the_template = container.getTemplate() myDTML = DTML(the_template.document_src()) request.componentTree.append(container) print myDTML(context, request, response) request.componentTree.pop() print '<!-- ... Methode: render (acComponent %s; DEBUG) -->' % \ container.title_and_id() return printed ## The End Method getTemplate: ## Script (Python) "getTemplate" ##bind container=container ##bind context=context ##bind namespace= ##bind script=script ##bind subpath=traverse_subpath ##parameters= ##title=gibt das Template-Objekt zurück ## # das Template-Objekt zurückgeben (die DTML-Methode): return context.aq_parent.components_[container.template] ## The End Any ideas? Thanks a lot, Tobias . . . . . . . . . . . . . . . . . . . . . . . . .