I have a couple of outstanding issues following an otherwise successful upgrade from Zope 2.7.4 to 2.10.3-final. One key application used the old DocumentLibrary product (http://www.zope.org/Members/Kaivo/DocumentLibrary). I have since reimplemented most of the functionality and migrated out the content, but I am unable to delete the old instances of the 'DocumentStore' class. This class is based on the old BTreeFolder which, as far as I can tell, cannot be be used in current versions of Zope. Starting Zope with the old BTreeFolder fails: Traceback (most recent call last): File "/usr/local/zope/lib/python/OFS/Application.py", line 703, in import_product product=__import__(pname, global_dict, global_dict, silly) File "/usr/local/zope/client0/Products/BTreeFolder/__init__.py", line 89, in ? import BTreeFolder File "/usr/local/zope/client0/Products/BTreeFolder/BTreeFolder.py", line 91, in ? from BTree import BTree ImportError: No module named BTree Swapping in BTreeFolder2 allowed me to access existing instances of DocumentLibrary, however attempting to delete the old instances of DocumentStore fails with the following error: Traceback (innermost last): Module ZPublisher.Publish, line 119, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 42, in call_object Module OFS.ObjectManager, line 524, in manage_delObjects Module OFS.ObjectManager, line 379, in _delObject Module zope.event, line 23, in notify Module zope.component.event, line 26, in dispatch Module zope.component._api, line 130, in subscribers Module zope.component.registry, line 290, in subscribers Module zope.interface.adapter, line 535, in subscribers Module zope.component.event, line 33, in objectEventNotify Module zope.component._api, line 130, in subscribers Module zope.component.registry, line 290, in subscribers Module zope.interface.adapter, line 535, in subscribers Module OFS.subscribers, line 108, in dispatchObjectWillBeMovedEvent Module zope.app.container.contained, line 181, in dispatchToSublocations Module OFS.subscribers, line 88, in sublocations Module Products.BTreeFolder2.BTreeFolder2, line 368, in objectValues Module Products.BTreeFolder2.BTreeFolder2, line 347, in objectIds AttributeError: 'NoneType' object has no attribute 'keys' If I could install the original BTreeFolder in Zope 2.10.3 - if only briefly - would that enable me to delete the old instances? Other ideas? Thanks, Ken __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com