Hi all, been very very foolish and didnt backup my entire zope installation prior to untarring the 2.2.x to 2.2.4 diff (binary) tgz. after restarting i get a message "couldnt import product.ZDbase" and one or two others, then screeds of oid errors then a start. But the site is a bit slaughtered because anything basedon a zclass I created durny work. even though it is there and not shown as brokwen itself. the only two shown as broken are zdbase and zdconfera. my zclass is only based on ZObject, CatalogAwareBase, _ZClass_for_Renderable so I am a bit stumped. when I try to list in magament view, the contents of any folder containing 1 or more instances of my zclass, the console shows things like: ------ 2000-11-28T14:37:38 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000\000k' Traceback (innermost last): File /home/zope/Zope-2.2.0-linux2-x86/lib/python/ZODB/Connection.py, line 448, in setstate File /home/zope/Zope-2.2.0-linux2-x86/lib/python/ZODB/Connection.py, line 213, in _persistent_load (Info: ) File /home/zope/Zope-2.2.0-linux2-x86/lib/python/ZODB/Connection.py, line 154, in __getitem__ (Info: ('\000\000\000\000\000\000\003\266', '(cExtensionClass\012ExtensionClass\012q\001(U\006ZDItemq\002(cZClasses.ZClass\012PersistentClass\012q\003cProducts.ZDBase.ZDiscussions\012ZDItem\012q\004cOFS.SimpleItem\012SimpleItem\012q\005tq\006}q\007(U\004iconq\010UWControl_Panel/Products/ZDiscussions/ZDTopic/propertysheets/methods/ZDItem%20/ziconImageq\011U\012_p_changedq\012K\001U\007__doc__q\013U\021ZDiscussions Itemq\014U\006_p_oidq\015U\010\000\000\000\000\000\000\002Lq\016U\011meta_typeq\017U\021ZDiscussions Itemq\020U\016propertysheetsq\021(U\010\000\000\000\000\000\000\003\271q\022(NU\010\000\000\000\000\000\000\003\265q\023Qttq\024QU\012index_htmlq\025cZClasses.Method\012MW\012q\026NRq\027}q\030U$_ZClassMethodPermissionMapperMethod_q\031(U\010\000\000\000\000\000\000\003\272q\032(U\016OFS.DTMLMethodq\033cOFS.DTMLMethod\012DTMLMethod\012q\034ttq\035QsbU\016manage_optionsq\036(}q\037(U\005labelq U\012Propertiesq!U\006actionq"U\025manage_propertiesFormq#u}q$(U\005labelq%U\010Securityq&U\006actionq\'U\015manage_accessq(u}q)(h%U\004Viewq*h\'U\012index_htmlq+utq,U\012ziconImageq-(U\010\000\000\000\000\000\000\003\273q.(U\011OFS.Imageq/cOFS.Image\012Image\012q0tq1tq2QU\022__ac_permissions__q3)U\011_p_serialq4U\010\0030\226a\274;\204\314q5U\012__module__q6U\031*73biqpAI2QDa2iKPitv57g==q7utq8t.N.')) Could not load oid , pickled data in traceback info may contain clues ------ 2000-11-28T14:44:30 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000\003\236' Traceback (innermost last): File /home/zope/Zope-2.2.0-linux2-x86/lib/python/ZODB/Connection.py, line 448, in setstate SystemError: Failed to import class _ZClass_for_ZDTopic from module Products.ZDBase any clues no matter how trivial gratefully received Jonathan London