Hi everyone, I'm trying to create a ZClass as a base for a folderish portal type. Now it seems I have a problem with the Base classes for my ZClass. When I try to add my portal type as a user in the portal, I get the following error message: Zope Error Zope has encountered an error while publishing this resource. Error Type: AttributeError Error Value: creation_date Traceback (innermost last): File C:\KKirchner\Zope2.3.2b\lib\python\ZPublisher\Publish.py, line 223, in publish_module File C:\KKirchner\Zope2.3.2b\lib\python\ZPublisher\Publish.py, line 187, in publish File C:\KKirchner\Zope2.3.2b\lib\python\Zope\__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File C:\KKirchner\Zope2.3.2b\lib\python\ZPublisher\Publish.py, line 171, in publish File C:\KKirchner\Zope2.3.2b\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: invokeFactory) File C:\KKirchner\Zope2.3.2b\lib\python\ZPublisher\Publish.py, line 112, in call_object (Object: invokeFactory) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\PortalFolder.py, line 368, in invokeFactory (Object: Traversable) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\TypesTool.py, line 714, in constructContent (Object: Traversable) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\TypesTool.py, line 473, in constructInstance (Object: ElementWithAttributes) File C:\KKirchner\Zope2.3.2b\lib\python\Shared\DC\Scripts\Bindings.py, line 324, in __call__ (Object: addTermPaper.py) File C:\KKirchner\Zope2.3.2b\lib\python\Shared\DC\Scripts\Bindings.py, line 354, in _bindAndExec (Object: addTermPaper.py) File C:\KKirchner\Zope2.3.2b\lib\python\Products\PythonScripts\PythonScript.py, line 336, in _exec (Object: addTermPaper.py) (Info: ({'script': <PythonScript instance at 01404F40>, 'context': <FactoryDispatcher instance at 01584330>, 'container': <FactoryDispatcher instance at 01584330>, 'traverse_subpath': []}, ('sfdd',), {}, None)) File Script (Python), line 2, in addTermPaper.py File C:\KKirchner\Zope2.3.2b\lib\python\ZClasses\ZClass.py, line 535, in createInObjectManager (Object: TermPaperClass) File C:\KKirchner\Zope2.3.2b\lib\python\OFS\ObjectManager.py, line 305, in _setObject (Object: Traversable) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\PortalContent.py, line 155, in manage_afterAdd (Object: DynamicType) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\PortalContent.py, line 138, in indexObject (Object: DynamicType) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\CatalogTool.py, line 225, in indexObject (Object: Traversable) File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFCore\CatalogTool.py, line 218, in catalog_object (Object: Traversable) File C:\KKirchner\Zope2.3.2b\lib\python\Products\ZCatalog\ZCatalog.py, line 429, in catalog_object (Object: Traversable) File C:\KKirchner\Zope2.3.2b\lib\python\Products\ZCatalog\Catalog.py, line 397, in catalogObject File C:\KKirchner\Zope2.3.2b\lib\python\Products\ZCatalog\Catalog.py, line 504, in recordify File D:\Zope Installationen\Zope_2.3.1_final\lib\python\Products\CMFDefault\DublinCore.py, line 268, in created (Object: DynamicType) AttributeError: (see above) The problem seems to be the DublinCore but one of my ZClasses base class is the DefaultDublinCoreImpl. Does anyone know which classes are necessary? Thanks, Katrin --------------------------------------------------------- Katrin Kirchner beehive elektronische medien GmbH Fischerhüttenstr. 79 b D-14163 Berlin Tel.: 0 30 / 84 78 20