Upgrade report

Dry run selected.
Starting the migration from version: 3.3.4
Cleaned up the toolset registry.
Ran upgrade step: Cleanup the persistent tool registry.
Upgrade aborted. Error:
Traceback (most recent call last):
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Plone-4.0a3-py2.6.egg/Products/CMFPlone/MigrationTool.py", line 160, in upgrade
    step['step'].doStep(setup)
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/upgrade.py", line 141, in doStep
    self.handler(tool)
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/plone.app.upgrade-1.0a3-py2.6.egg/plone/app/upgrade/v40/alphas.py", line 43, in updateToolset
    loadMigrationProfile(context, name)
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/plone.app.upgrade-1.0a3-py2.6.egg/plone/app/upgrade/utils.py", line 104, in loadMigrationProfile
    context.runAllImportStepsFromProfile(profile, purge_old=False)
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/tool.py", line 331, in runAllImportStepsFromProfile
    ignore_dependencies=ignore_dependencies)
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/tool.py", line 1079, in _runImportStepsFromContext
    steps = self.getSortedImportSteps()
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/tool.py", line 253, in getSortedImportSteps
    for step in set(steps) ]
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/tool.py", line 259, in getImportStepMetadata
    res=self._import_registry.getStepMetadata(step, default)
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/registry.py", line 264, in getStepMetadata
    result['invalid'] =  _resolveDottedName( result[ 'handler' ] ) is None
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.GenericSetup-1.5.0b1-py2.6.egg/Products/GenericSetup/utils.py", line 111, in _resolveDottedName
    module = __import__( '.'.join( parts_copy ) )
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.PloneFormGen-1.5.5-py2.6.egg/Products/PloneFormGen/__init__.py", line 14, in <module>
    from Products import PythonField, TALESField, TemplateFields
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.PythonField-1.1.2-py2.6.egg/Products/PythonField/__init__.py", line 25, in <module>
    from _field import PythonField
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.PythonField-1.1.2-py2.6.egg/Products/PythonField/_field.py", line 31, in <module>
    class PythonWidget(TextAreaWidget):
  File "/Users/leejoramo/Sites/Plone4/buildout-cache/eggs/Products.PythonField-1.1.2-py2.6.egg/Products/PythonField/_field.py", line 33, in PythonWidget
    __implements__ = TextAreaWidget.__implements__
AttributeError: type object 'TextAreaWidget' has no attribute '__implements__'
End of upgrade path, migration has finished
The upgrade path did NOT reach current version
Migration has failed
Dry run selected, transaction aborted
Version Overview

Plone 4.0a3
Zope 2.12.1
Python 2.6.4 (r264:75706, Jan 21 2010, 11:30:14) [GCC 4.0.1 (Apple Inc. build 5465)]