[Zope] Zope Versions unusable?

[Jochen Haeberle]

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')

Traceback (innermost last):
   File /serve/Zope-2.1.0-NR/lib/python/ZPublisher/Publish.py, line 
214, in publish_module
   File /serve/Zope-2.1.0-NR/lib/python/ZPublisher/Publish.py, line 
179, in publish
   File /serve/Zope-2.1.0-NR/lib/python/Zope/__init__.py, line 202, in 
zpublisher_exception_hook
     (Object: ApplicationDefaultPermissions)
   File /serve/Zope-2.1.0-NR/lib/python/ZPublisher/Publish.py, line 
169, in publish
   File /serve/Zope-2.1.0-NR/lib/python/ZODB/Transaction.py, line 237, in commit
   File /serve/Zope-2.1.0-NR/lib/python/ZODB/Connection.py, line 327, in commit
     (Info: (('*/z19MlDlV7e7P0QHV0lJ5A==', 'AdBanner'), 
'\000\000\000\000\000\000\005\341', ''))
   File /serve/Zope-2.1.0-NR/lib/python/ZODB/FileStorage.py, line 614, in store
     (Object: /serve/Zope-2.1.0-NR/var/Data.fs)
VersionLockError: (see above)


Is this something known to you? Is this a bug? Does anyone know when 
this can happen? Are there things to avoid when working in a version?

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!

Regards

Jochen