Yo dudes, I tried to install the TrackerBase product on my 2.4.0b3 Zope version.... with the tracker from CVS (just got it this morning) the README is quite specific: 1) make sure the TrackerBase is available as a product the install dir is ../lib/python/Products/TrackerBase ok. 2) make a simlink in Extensions to TrackerMethods.py ok. 3) Copy Tracker.zexp to your import dir ok. ( 4) import Tracker.zexp from Control_Panel/Products (I first restarted the Server) ok ("Tracker successfully installed") Now I tried to add a Tracker object to a Folder, id=x title=y and I get this exception from the server: Error Type: TypeError Error Value: Catalog addIndex now requires the index type to be resolved prior to adding; create the proper index in the caller. Traceback (innermost last): File .../lib/python/ZPublisher/Publish.py, line 223, in publish_module File .../lib/python/ZPublisher/Publish.py, line 187, in publish File .../lib/python/Zope/__init__.py, line 226, in zpublisher_exception_hook (Object: RoleManager) File .../lib/python/ZPublisher/Publish.py, line 171, in publish File .../lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: addTracker) File .../lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: addTracker) File .../lib/python/Products/ExternalMethod/ExternalMethod.py, line 274, in __call__ (Object: addTracker) (Info: ((<Factory instance at 81267c8>, 'x', <h3>form</h3><table><tr>... Ok, since the error message is very consise, I suspect this to be a known problem .... So do I fix this ? TIA, Sloot.