Hia guys, running the GUM product on a fresh BerkeleyDB based 2.4.0a1 instance on Linux raises the following issue for the field index type: Site Error An error was encountered while publishing this resource. Error Type: ('type', 0, <type 'string'>, <type 'int'>) Error Value: None 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 /home/morten/tmp/Zope-2.4.0a1-src/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/ZPublisher/Publish.py, line 187, in publish File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: CatalogAware) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/ZPublisher/Publish.py, line 171, in publish File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: index_html) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: index_html) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/App/special_dtml.py, line 127, in __call__ (Object: index_html) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/DocumentTemplate/DT_String.py, line 543, in __call__ (Object: index_html) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/DocumentTemplate/DT_In.py, line 681, in renderwob (Object: get_incoming_message_containers) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/Products/GUM/gum.py, line 591, in get_incoming_message_containers (Object: CatalogAware) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/Products/GUM/gum.py, line 858, in get_gum_message_containers (Object: CatalogAware) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/Products/ZCatalog/ZCatalog.py, line 582, in searchResults (Object: LockableItem) File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/Products/ZCatalog/Catalog.py, line 663, in searchResults File /home/morten/tmp/Zope-2.4.0a1-src/lib/python/Products/ZCatalog/Catalog.py, line 550, in _indexedSearch ('type', 0, <type 'string'>, <type 'int'>): (see above) I added an extra try except block: if request.has_key(index.id) : try: if len(request[index.id])>0: r=index._apply_index(request) except: raise str((index.id, request[index.id], type(index.id), type(request[index.id]))) The original exception was a TypeError, len() of unsized object. Cheers, Morten