2.1.x -> 2.5.2: Error value: 'NoneType' object has no attribute 'addMember'
I can't take credit for the solution on this one, it was found in the tracker: http://plone.org/products/plonepas/issues/29
At line 387 of PlonePAS/Extensions/Install.py (version that ships with Plone 2.5.2) add the conditional emphasized below.
# restore group memberships gid = g group = gtool.getGroupById(gid) if group is not None: for mid in groupmemberships[gid]: group.addMember(mid) print >> out, "%s " % mid
I have encountered the problem more than once, though, so I think the error belongs in the reference.