Hi! I have created a ZCatalog, but whenever I try to access the 'Catalog' view in the management interface of the ZCatalog, I get en error message: Zope has encountered an error while publishing this resource. Error Type: AttributeError Error Value: class NoBrainer has no attribute '__call__' Traceback (innermost last): File /usr/local/Zope-2.3.1-src/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /usr/local/Zope-2.3.1-src/lib/python/ZPublisher/Publish.py, line 187, in publish File /usr/local/Zope-2.3.1-src/lib/python/Zope/__init__.py, line 221, in zpublisher_exception_hook (Object: Traversable) File /usr/local/Zope-2.3.1-src/lib/python/ZPublisher/Publish.py, line 171, in publish File /usr/local/Zope-2.3.1-src/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: manage_catalogView) File /usr/local/Zope-2.3.1-src/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: manage_catalogView) File /usr/local/Zope-2.3.1-src/lib/python/Shared/DC/Scripts/Bindings.py, line 324, in __call__ (Object: manage_catalogView) File /usr/local/Zope-2.3.1-src/lib/python/Shared/DC/Scripts/Bindings.py, line 354, in _bindAndExec (Object: manage_catalogView) File /usr/local/Zope-2.3.1-src/lib/python/App/special_dtml.py, line 236, in _exec (Object: manage_catalogView) File /usr/local/Zope-2.3.1-src/lib/python/DocumentTemplate/DT_In.py, line 627, in renderwb (Object: searchResults) File /usr/local/Zope-2.3.1-src/lib/python/DocumentTemplate/DT_With.py, line 132, in render (Object: aq_self) AttributeError: (see above) This error also occurs when I try to find new objects for my catalog. I also created a product which uses ZClasses that are ZCatalog:aware, and I want these objects to get indexed automatically. Could this be a problem?? Here are some informations about my system: Zope 2.3.1 (source release, python 1.5.2, linux2) 2.1 (#1, Apr 26 2001, 10:44:51) [GCC 2.95.4 20010319 (Debian prerelease)] linux2 Thank you Stefan