Hello, Within zope2 (2.10.6) I can't load the pickle containing the persistentregistry any more because I removed a product that has persistent adatpers. So I am having a state that looks like this: {'LookupClass': <class 'five.localsitemanager.registry.FiveVerifyingAdapterLookup'>, '__bases__': (<zope.component.globalregistry.GlobalAdapterRegistry object at 0x7f38ad2f6bd0>,), '__parent__': <PersistentComponents /m00019/prsi>, '_adapters': [{<InterfaceClass Products.ATContentTypes.interface.interfaces.IATCTTool>: {u'': <ATCTTool at portal_atct>}, <InterfaceClass Products.CMFActionIcons.interfaces._tools.IActionIconsTool>: {u'': <ActionIconsTool at portal_actionicons>}, <class 'clearwind.arecibo.interfaces.IAreciboConfiguration'>: {u'Arecibo_config': <AreciboConfiguration at broken>}, <InterfaceClass plone.app.i18n.locales.interfaces.IContentLanguages>: {u'': <ContentLanguages at plone_app_content_languages>}, ...] '_generation': ..., '_provided': ..., '_subscribers': ..., } Clearly this registry is in bad shape because of the reference to the broken interface. What are my options to remove the reference within this pickle ? Would it be possible disable/remove (before setstate) the broken class from the registry (with a huge warning) instead of letting the user get a "AttributeError: type object 'IAreciboConfiguration' has no attribute '__iro__' exception" later on when the adapter is looked up ? Thanks in advance, Jeff