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) ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. Admin Orion System AS **********************************************************************