I'm running into strange trouble with one site when I try to upgrade it from Zope 2.4 to 2.5.0. With 2.4 (up to 2.4.4b1), the site works fine. Now when I upgrade Zope to 2.5.0 (or 2.5.1b1), I get an "TypeError: object of type 'string' is not callable" whenever I try to access the site (see below). Furthermore, running the Data.fs ZODB with 2.5.x once seems to corrupt it! I.e. when I move back the Data.fs to 2.4.4b1 (where it had worked before), it suddenly fails with the same error! This is the error message: Site Error An error was encountered while publishing this resource. TypeError Sorry, a site error occurred. Traceback (innermost last): File /tmp/z/Zope-2.5.1b1-src/lib/python/ZPublisher/Publish.py, line 150, in publish_module File /tmp/z/Zope-2.5.1b1-src/lib/python/ZPublisher/Publish.py, line 114, in publish File /tmp/z/Zope-2.5.1b1-src/lib/python/Zope/__init__.py, line 159, in zpublisher_exception_hook (Object: MyOwnSite) File /tmp/z/Zope-2.5.1b1-src/lib/python/ZPublisher/Publish.py, line 89, in publish File /tmp/z/Zope-2.5.1b1-src/lib/python/ZPublisher/BaseRequest.py, line 247, in traverse File /tmp/z/Zope-2.5.1b1-src/lib/python/ZPublisher/BeforeTraverse.py, line 99, in __call__ TypeError: object of type 'string' is not callable The output is the same for any path I try. The ZMI (http://localhost:8080/manage) also fails with this error. The output of starting Zope (see below) doesn't show anything suspicious. I have no idea what could cause this problem, and how I could try to track down the problem. Below I attach the output of starting Zope in debug mode. The output of starting 2.4.4b1 (which works fine) in debug mode: ------ 2002-03-06T13:19:01 PROBLEM(100) ZODB Could not import class 'Connection' from module 'Products.ZMySQLDA.DA' /tmp/z/Zope-2.4.4b1-src/lib/python/SearchIndex/__init__.py:91: DeprecationWarning: The usage of the SearchIndex package is deprecated since Zope 2.4. This package is only kept for backwards compatibility for a while and will go away in a future release. Please use instead the re-factored modules in Products/PluginIndexes. warnings.warn("The usage of the SearchIndex package is deprecated since \ ------ 2002-03-06T13:19:12 INFO(0) ZServer HTTP server started at Wed Mar 6 14:19:12 2002 Hostname: clapton Port: 8081 ------ 2002-03-06T13:19:12 INFO(0) ZServer FTP server started at Wed Mar 6 14:19:12 2002 Hostname: clapton Port: 8022 The output of starting 2.5.1b1 (which doesn't work) in debug mode: ------ 2002-03-06T13:24:52 PROBLEM(100) ZODB Could not import class 'Connection' from module 'Products.ZMySQLDA.DA' ------ 2002-03-06T13:24:52 INFO(0) ZODB Opening database for mounting: '142567176_1015421092.553436' ------ 2002-03-06T13:24:52 INFO(0) ZODB Mounted database '142567176_1015421092.553436' at /temp_folder ------ 2002-03-06T13:25:01 INFO(0) Zope New disk product detected, determining if we need to fix up any ZClasses. ------ 2002-03-06T13:25:02 INFO(0) ZServer HTTP server started at Wed Mar 6 14:25:02 2002 Hostname: clapton Port: 8081 ------ 2002-03-06T13:25:02 INFO(0) ZServer FTP server started at Wed Mar 6 14:25:02 2002 Hostname: clapton Port: 8022