[Zope-ZEO] ZODB problems...

[Steinar Rune Eriksen]

Hi all,
I am trying to load a Python class as an extension which again accesses data
stored under ZODB. The Python classes are stored in a directory under
"Products" and I manage to create a sub ZClass in Zope for it. I have a
method on one of these classes which I call from a DTML document... the
method opens the ZODB and the first lines connects to the database
successfully
......................................................
self.__storage=FileStorage.FileStorage('/MyData.fs')
self.__db= DB(self.__storage)
self.__conn=self.__db.open()		
......................................................
, I print some debug information to stdandard out, so I know that my data
are read ok; the function eventually produces an XML document which is run
through a stylsheet producing an HTML string which I am trying to return to
Zope for viewing in the browser.... but.. on return I get the following
error which I think is connected to ZODB and transaction management. But I
don't understand it. Anyone ?

Zope Error
Zope has encountered an error while publishing this resource. 
Error Type: cPickle.PicklingError
Error Value: Cannot pickle objects.

Traceback (innermost last):
  File D:\Zope\lib\python\ZPublisher\Publish.py, line 222, in publish_module
  File D:\Zope\lib\python\ZPublisher\Publish.py, line 187, in publish
  File D:\Zope\lib\python\Zope\__init__.py, line 221, in
zpublisher_exception_hook
    (Object: ElementWithAttributes)
  File D:\Zope\lib\python\ZPublisher\Publish.py, line 175, in publish
  File D:\Zope\lib\python\Zope\__init__.py, line 235, in commit
  File D:\Zope\lib\python\ZODB\Transaction.py, line 251, in commit
  File D:\Zope\lib\python\ZODB\Connection.py, line 348, in commit
    (Info: (('*vX4XbP4DN2I9Lx6KaHCunA==', 'scr'),
'\000\000\000\000\000\000\016#', ''))
cPickle.PicklingError: (see above)





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