-----Original Message----- From: Jochen Haeberle [mailto:listen@MIDRAS.de] Sent: Sunday, December 19, 1999 11:57 AM To: Zope-Talk Subject: [Zope] Zope Versions unusable?

Hi,

I had to discard a version I was working on in Zope 2.1 twice already because in the normal view there happened a "VersionLockError":

Error Type: VersionLockError Error Value: ("'\\000\\000\\000\\000\\000\\000\\005\\341'", 'ArtikelVersion')

Is this something known to you? Is this a bug? Does anyone know when this can happen?

A VersionLockError means that you are trying to modify an object that is locked in a version. If you change an object in a version, and then try and change that object out of a a version (or in a different version) you will get this error. Only one version at at time can modify an object.

Are there things to avoid when working in a version?

Oh yes. Cataloging does not work well in a version. If you enter a version, and then start playing with objects that catalog themselves, then the catalog object itself can get locked in a version, locking out any other objects from indexing themselves with this exact same error.

If this happens rather often and unknown to the content manager, I guess the Versions of Zope are rather unusable, because they do not protect your working securly!

Your version and database should still be intact, it just didn't let you make the change you tried to make on the locked object. Zope puts a little lock icon next to objects that are locked in a version. The workaround for this is to commit or abort your versions before modifying locked objects. -Michel