>>> list(app.openplans.portal_repository.getHistory(app.openplans.projects.fleem))
Traceback (most recent call last):
  File "<input>", line 1, in ?
  File "/home/jhammel/op25/zope/Products/CMFEditions/CopyModifyMergeRepositoryTool.py", line 702, in next
    return self._getItem(self._pos)
  File "/home/jhammel/op25/zope/Products/CMFEditions/CopyModifyMergeRepositoryTool.py", line 680, in __getitem__
    return self._retrieve(self._obj, selector=selector, preserve=self._preserve)
  File "/home/jhammel/op25/zope/Products/CMFEditions/CopyModifyMergeRepositoryTool.py", line 412, in _retrieve
    preserve=preserve, inplace=False)
  File "/home/jhammel/op25/zope/Products/CMFEditions/CopyModifyMergeRepositoryTool.py", line 468, in _recursiveRetrieve
    vdata = portal_archivist.retrieve(obj, history_id, selector, preserve)
  File "/home/jhammel/op25/zope/Products/CMFEditions/ArchivistTool.py", line 308, in retrieve
    history = self.getHistory(obj, history_id, preserve)
  File "/home/jhammel/op25/zope/Products/CMFEditions/ArchivistTool.py", line 323, in getHistory
    raise ArchivistUnregisteredError(
ArchivistUnregisteredError: Retrieving a version of an unregistered object is not possible. Register the object '<OpenProject at fleem>' first. 
>>> app.openplans.projects
<ATBTreeFolder at /openplans/projects>
>>> app.openplans.projects.fleem
<OpenProject at /openplans/projects/fleem>