Brian, the tranalyser reported a clean (old) data.fs and I don't use any python base classes for any of my zclasses - however, in the interests of my own sanity, I'm pleased to report success with an old recipe - I started with a fresh Data.fs and cleaned out some cruft from my Products folder. After removing all the stuff I'm not using now (ZopePTK and ZDConfera/ZDiscussions products in particular), I was able to import my zclasses and then the major application folder - everything looks fine now and seems to work. Lesson may be that a Data.fs which works with an earlier zope version may fail when upgrading to 2.2.1 - if so, try 1. Export everything you need (zclasses and data) from your current working zope into the target zope /import directory 2. clear out all that old cruft which you don't use anymore from your zinstancehome or other Products folder, 3. start 2.2.1 with a copy of the distribution Data.fs (cp Data.fs.in Data.fs) 4. import all your zclasses 5. import all your folders worked for me. Brian Lloyd wrote:

...

2000-08-26T06:03:27 ERROR(200) ZODB Couldn't load state for '\000\000\000\000\000\000\016\204' Traceback (innermost last): File /usr/local/zope/zope221/lib/python/ZODB/Connection.py, line 447, in setstate File /usr/local/zope/zope221/lib/python/ZODB/Connection.py, line 213, in _persistent_load (Info: File /usr/local/zope/zope221/lib/python/ZODB/Connection.py, line 154, in __getitem__ (Info: ('\000\000\000\000\000\000*\252', '(cExtensionClass\012ExtensionClass\012q\001(U\006ZDItemq\002( cZClasses.ZClass\012PersistentCl$ Could not load oid

--- In zope@egroups.com, Andy Dustman <adustman@c...> wrote:

...

Sadly, 2.2.1 seems to break all my ZClass objects. The Products themselves look fine, but any object made with them comes up as broken. The Class ID (in the HTML source) looked like it had a * in front of it. I retrograded to 2.2.0 and the problems went away.

Hi Ross -

I'm having trouble reproducing this here, so I wanted to see if I could try to rule out a few things:

- Does this happen with _all_ of your custom ZClasses, or just certain ones?

- They dont depend on a Python-level base class or something that maybe didn't get moved into the new installation do they?

- Does tranalyzer.py give your database a clean bill of health?

If none of the above apply, would it be possible for you to send me an export file of one of the products so I can look into this further?

Thanks!

Brian Lloyd brian@digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

-- Dr Ross Lazarus Associate Professor and Sub-Dean for Information Technology Faculty of Medicine, Room 114, A27, University of Sydney, Camperdown, NSW 2006, Australia Tel: (+61 2) 93514429 Mobile: +61414872482 Fax: (+61 2) 93516646 Email: rossl@med.usyd.edu.au