Just a wild guess:
ERROR(200) Conflict Resolution Unexpected error Traceback (innermost last): File /usr/local/Zope-2.6.1-src/lib/python/ZODB/ConflictResolution.py, line 96, in tryToResolveConflict (Object: /usr/local/ZopeHome/var/Data.fs) SystemError: Failed to import class ClassicHTMLFile from module App.special_dtml
This is logged by some bare except in the ZODB module, but it seems it has nothing to do with Your Data.fs. It seems the ZODB cannot import a class which should be there, however. Could You try to get a python shell for Your Zope installation and try the following commands (after fixing typos ;-): import Zope Zope.startup() from App.special_dtml import ClassicHTMLFile The last import normally should succeed, (it is in lib/python/App/special_dtml.py) but it seems in your case it failes for some reason. Cheers, Clemens