TypeError "'NoneType' object is not callable" on Migration from 2.5.5 to 3.2.2

[bkeown]

Old site was on Zope 2.9.8 / Plone 2.5.5

New installation is the stable Unified 3.2.2 installer version (zeocluster).

I'm getting this error solid, even after removing all the add-on products I possibly could.

Result of the attempt...

• Starting the migration from version: 2.5.5
• Attempting to upgrade from: 2.5.5
• Upgrade aborted
• Error type: exceptions.TypeError
• Error value: 'NoneType' object is not callable
• File "/usr/local/Plone/buildout-cache/eggs/Plone-3.2.2-py2.4.egg/Products/CMFPlone/MigrationTool.py", line 210, in upgrade newv, msgs = self._upgrade(newv)
• File "/usr/local/Plone/buildout-cache/eggs/Plone-3.2.2-py2.4.egg/Products/CMFPlone/MigrationTool.py", line 321, in _upgrade res = function(self.aq_parent)
• File "/usr/local/Plone/buildout-cache/eggs/Plone-3.2.2-py2.4.egg/Products/CMFPlone/migrations/v3_0/alphas.py", line 123, in three0_alpha1 installProduct('CMFDiffTool', portal, out, hidden=True)
• File "/usr/local/Plone/buildout-cache/eggs/Plone-3.2.2-py2.4.egg/Products/CMFPlone/migrations/v3_0/alphas.py", line 626, in installProduct installOrReinstallProduct(portal, product, out, hidden=hidden)
• File "/usr/local/Plone/buildout-cache/eggs/Plone-3.2.2-py2.4.egg/Products/CMFPlone/migrations/migration_util.py", line 85, in installOrReinstallProduct qi.installProduct(product_name, hidden=hidden)
• File "/usr/local/Plone/buildout-cache/eggs/Products.CMFQuickInstallerTool-2.1.6-py2.4.egg/Products/CMFQuickInstallerTool/QuickInstallerTool.py", line 521, in installProduct portal_setup.runAllImportStepsFromProfile('profile-%s' % profile)
• File "/usr/local/Plone/buildout-cache/eggs/Products.GenericSetup-1.4.2.2-py2.4.egg/Products/GenericSetup/tool.py", line 390, in runAllImportStepsFromProfile ignore_dependencies=ignore_dependencies)
• File "/usr/local/Plone/buildout-cache/eggs/Products.GenericSetup-1.4.2.2-py2.4.egg/Products/GenericSetup/tool.py", line 1182, in _runImportStepsFromContext message = self._doRunImportStep(step, context)
• File "/usr/local/Plone/buildout-cache/eggs/Products.GenericSetup-1.4.2.2-py2.4.egg/Products/GenericSetup/tool.py", line 1093, in _doRunImportStep return handler(context)
• File "/usr/local/Plone/buildout-cache/eggs/Products.GenericSetup-1.4.2.2-py2.4.egg/Products/GenericSetup/tool.py", line 128, in importToolset new_tool = tool_class(tool_id)
• End of upgrade path, migration has finished
• The upgrade path did NOT reach current version
• Migration has failed