Hallo, while adding ZClass instances by form I get the following traceback: I don't know what's a wrapped object?? And where the problem is. Thanks -->>>>>>> Zope Error Zope has encountered an error while publishing this resource. Error Type: ValueError Error Value: Invalid property value: wrapped object -------------------------------------------------------------------------------- Troubleshooting Suggestions The URL may be incorrect. The parameters passed to this resource may be incorrect. A resource that this resource relies on may be encountering an error. For more detailed information about the error, please refer to the HTML source for this page. If the error persists please contact the site maintainer. Thank you for your patience. Traceback (innermost last): File C:\Zopppaaa\lib\python\ZPublisher\Publish.py, line 222, in publish_module File C:\Zopppaaa\lib\python\ZPublisher\Publish.py, line 187, in publish File C:\Zopppaaa\lib\python\Zope\__init__.py, line 221, in zpublisher_exception_hook (Object: ElementWithAttributes) File C:\Zopppaaa\lib\python\ZPublisher\Publish.py, line 171, in publish File C:\Zopppaaa\lib\python\ZPublisher\mapply.py, line 160, in mapply (Object: testskript) File C:\Zopppaaa\lib\python\ZPublisher\Publish.py, line 112, in call_object (Object: testskript) File C:\Zopppaaa\lib\python\OFS\DTMLMethod.py, line 167, in __call__ (Object: testskript) File C:\Zopppaaa\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: testskript) File C:\Zopppaaa\lib\python\DocumentTemplate\DT_With.py, line 146, in render (Object: manage_addProduct['DBank']) File C:\Zopppaaa\lib\python\DocumentTemplate\DT_Util.py, line 337, in eval (Object: eingang_DB_add (_.None, _, NoRedir=1)) (Info: eingang_DB_add) File <string>, line 0, in ? File C:\Zopppaaa\lib\python\OFS\DTMLMethod.py, line 163, in __call__ (Object: eingang_DB_add) File C:\Zopppaaa\lib\python\DocumentTemplate\DT_String.py, line 502, in __call__ (Object: eingang_DB_add) File C:\Zopppaaa\lib\python\DocumentTemplate\DT_With.py, line 146, in render (Object: eingang_DB.createInObjectManager(REQUEST['id'], REQUEST)) File C:\Zopppaaa\lib\python\DocumentTemplate\DT_Util.py, line 337, in eval (Object: propertysheets.eingangs_info.manage_editProperties(REQUEST)) (Info: REQUEST) File <string>, line 0, in ? File C:\Zopppaaa\lib\python\OFS\PropertySheets.py, line 456, in manage_editProperties (Object: Traversable) File C:\Zopppaaa\lib\python\OFS\PropertySheets.py, line 255, in _updateProperty (Object: Traversable) File C:\Zopppaaa\lib\python\OFS\PropertySheets.py, line 208, in _wrapperCheck (Object: Traversable) ValueError: (see above)