Hi there, I have a big problem with an Plone site throwing btreefolder errors. Traceback (innermost last): Module ZPublisher.Publish, line 113, in publish Module ZPublisher.mapply, line 88, in mapply Module ZPublisher.Publish, line 40, in call_object Module OFS.CopySupport, line 193, in manage_pasteObjects Module OFS.ObjectManager, line 307, in _setObject Module Products.CMFCore.CMFCatalogAware, line 199, in manage_afterAdd Module Products.CMFCore.CMFCatalogAware, line 235, in __recurse Module Products.Archetypes.BaseBTreeFolder, line 37, in manage_afterAdd Module Products.Archetypes.BaseFolder, line 104, in manage_afterAdd Module Products.Archetypes.BaseObject, line 179, in manage_afterAdd - __traceback_info__: (<CartManager at /whirlweb/backup/whirlweb/portal_cartmanager>, <PloneSite at /whirlweb/backup/whirlweb>, <Folder at /whirlweb/backup>) Module Products.Archetypes.Referenceable, line 217, in manage_afterAdd Module Products.Archetypes.Referenceable, line 348, in _referenceApply Module Products.ZCatalog.Lazy, line 158, in __getitem__ Module Products.BTreeFolder2.BTreeFolder2, line 210, in _getOb KeyError: '11464251260848050376' The site runs fine for some time, then it just throws that error, and I have to restart zope. I can export the site, but not import it. Neither I can copy the site, or pack the db. I tried the checkbtrees.py script. It produces som 1200 lines some like: ['Application'].Control_Panel.Products.Formulator.Help.LabelField <persistent broken Products.Formulator.FieldHelpTopic.FieldHelpTopic instance "\x00\x00\x 00\x00\x00\x0e'r"> but most f the show somethings like: ['Application'].Control_Panel.Products.CMFTestCase.Help.catalog._catalog.__len__ <BTrees.Length.Length object at 0x40f96cac> and the final line says: total 620613 found 1299 what can I do to fix this error