[Zope] Export from 2.5.1 and import into 2.6.1

[Jens Dobberthin]

Hi,

does anybody know why the import of a ZClass-based product does not
work? I'm trying to import a product from 2.5.1 into 2.6.1 and always
get the traceback below. Any suggestions? Other Products will import
fine, just this one fails because it needs a class called 'iclass'. What
is this class supposed to do?

Thanks in advance,
Jens.

------
2003-03-19T15:36:07 ERROR(200) Zope Couldn't install DocumentPool
Traceback (innermost last):
  File /home/jens/zope/Zope-2.6.1-src/lib/python/OFS/Application.py,
line 637, in install_product
    (Object: Zope)
    (Info: DocumentPool)
  File /home/jens/zope/Zope-2.6.1-src/lib/python/App/Product.py, line
512, in initializeProduct
    (Object: Products.DocumentPool)
  File /home/jens/zope/Zope-2.6.1-src/lib/python/ZODB/ExportImport.py,
line 79, in importFile
  File /home/jens/zope/Zope-2.6.1-src/lib/python/ZODB/Transaction.py,
line 235, in commit
  File /home/jens/zope/Zope-2.6.1-src/lib/python/ZODB/Transaction.py,
line 349, in _commit_objects
  File /home/jens/zope/Zope-2.6.1-src/lib/python/ZODB/Connection.py,
line 286, in commit
  File /home/jens/zope/Zope-2.6.1-src/lib/python/ZODB/ExportImport.py,
line 147, in _importDuringCommit
ImportError: No module named iclass