We've got a bit of a situation... We run Zope 2.11 with a main ZODB and a few dozen separate file storages for sub-sites. Occasionally, we've encountered the problem where a cut-and-paste occurs between storages and upon a pack results in a key error. Normally, we avoid this because the FileStorages represent individual sites. Last night something happened where a script was cut-and-pasted from one of the sub-storages into the main, root-level, database. Upon a restart we encountered a key error: File "/var/local/zope/Zope-2.11.4-1/lib/python/ZODB/Connection.py", line 361, in get_connection new_con = self._db.databases[database_name].open( KeyError: 'site1' Normally, we've encountered these errors when a database is packed and the solution is to revert to a pre-pack database and remove or fix the offending object. In this case, we can't even start Zope or mount the storage in a script to remove the offending items. Before I go on, I found that ZODB 3.9 provides options to disallow cross-database references and we'll work to get to this version during our next upgrade cycle. In the mean time we've reverted to a previous backup prior to the offending object being placed in the root database. This resulted in about 200 MB of data loss. I would like a way to mount the corrupted database and attempt to determine exactly what was lost. What we've tried so far has gone like this: from ZODB import FileStorage, DB from OFS.Folder import Folder storage = FileStorage.FileStorage('BadData.fs') db = DB(storage) conn = db.open() root = conn.root() app = root['Application'] app.manage_deleteObjects(['OffendingObject']) # This throws the same exception so we tried working around the # mechanics of manage_deleteObjects with this. app._objects = tuple([i for i in app._objects if i['id'] != 'OffendingObject']) Same exception. Can't access the database. We've tried using _setOb to replace the object. Any suggestions? It seems as though it needs to be able to access _objects before it mounts the mounted databases. Thanks, -- Brian Brinegar Web Services Coordinator Engineering Computer Network