Plone 4.3 migration - AttributeError: type object 'IIntIds' has no attribute '__iro__' -

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after migrating plone 4.1 + dexterity site plone 4.3 site's /manage_workspace becomes inaccessible. database migration cannot performed.

the zmi root can still accessed.

traceback (innermost last):      module zpublisher.publish, line 237, in publish_module_standard     module zpublisher.publish, line 179, in publish     module zope.event, line 31, in notify     module zope.component.event, line 24, in dispatch     module zope.component._api, line 136, in subscribers     module zope.component.registry, line 321, in subscribers     module zope.interface.adapter, line 585, in subscribers     module plone.transformchain.zpublisher, line 119, in applytransformonfailure     module plone.transformchain.zpublisher, line 79, in applytransformonsuccess     module plone.transformchain.zpublisher, line 55, in applytransform     module zope.component._api, line 172, in queryutility     module zope.component.registry, line 163, in queryutility     module zodb.connection, line 860, in setstate     module zodb.connection, line 914, in _setstate     module zodb.serialize, line 613, in setghoststate     module zope.component.persistentregistry, line 40, in __setstate__     module zope.interface.adapter, line 91, in _createlookup     module zope.interface.adapter, line 439, in __init__     module zope.interface.adapter, line 476, in init_extendors     module zope.interface.adapter, line 480, in add_extendor  attributeerror: type object 'iintids' has no attribute '__iro__'

also @@plone-upgrade inaccessible.

any ideas or special migrations needed?

in dexterity 2, relation field support (which includes installing intids catalog) no longer installed default. need install dexterity [relations] extra:

[instance] eggs =     plone.app.dexterity [relations]

this documented @ http://plone.org/documentation/manual/upgrade-guide/version/upgrading-plone-4.2-to-4.3/dexterity-optional-extras , in dexterity release notes.


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