If anyone can shed some light on this it would be a great help to the newbies out here. Perhaps I could even do a HOWTO, and lighten the load on the list considerably ;) I don't have a solution to Alexander's problem quoted below, but it's one I keep hitting and one that is frequently asked on this list. In fact it's one I recently asked for more info on, to no avail. So I thought I'd add my voice to the clamour. Deleting products seems to be a very risky business in Zope. Things apparently get left behind in the ZOBD which shouldn't be there. If I delete a product that was used at some point elsewhere, I don't just get broken objects, I get pickled data streaming out of my Zope most of the time. Today I had an interesting one: I thought I had cleaned up thoroughly after an unwanted product, and I was getting no error messages and no pickled junk on stderr. The only thing I couldn't do is add ZClasses, for which I got the error message quoted by Alexander below (could not load object oid=[random character]). Please, can any Master Zopician give an explanation: 1) what causes this kind of error? 2) how do you debug it? 3) how do you fix your Data.fs? Thanks! Seb. * Alexander Chelnokov <[EMAIL PROTECTED]> [001108 18:21]: > Hello All, > > After a linux machine crash or cold restart something strange is going > on with Zope (2.2.2) - all objects built on ZClass-based products like > Yihaw or QSurvey are broken. Products are in Product folder, and i > even can add an object and it works, but when i try to access it in a > new browser window it reports > ========== > This object is broken because the unknown product that created it is > no longer installed or is installed incorrectly. Please contact your > product vendor for assistance. > Note that the data associated with this product has not been lost, and > will be accessible again if the product is reinstalled. > ========== > > Well, i removed QSurvey and tried to re-install its current version - > something goes wrong again: > > ========== > Zope Error > Zope has encountered an error while publishing this resource. > > Error Type: Could not load oid ={, pickled data in traceback info may > contain clues > Error Value: None > ========== > > Is there any way to fix ZODB less radical than complete reinstall? > > -- > Best regards, > Alexander N. Chelnokov > Ural Scientific Institute of Traumatology and Orthopaedics > 7, Bankovsky str. Ekaterinburg 620014 Russia > ICQ: 25640913 > > > > _______________________________________________ > Zope maillist - [EMAIL PROTECTED] > http://lists.zope.org/mailman/listinfo/zope > ** No cross posts or HTML encoding! ** > (Related lists - > http://lists.zope.org/mailman/listinfo/zope-announce > http://lists.zope.org/mailman/listinfo/zope-dev ) > _______________________________________________ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )