[Zope] Error importing zexp

[Tom Cameron]

I am trying to move a zope site from one server to another. I exported the
site to a zexp file and then try to import it into the other machine.

I keep getting:

Error Type: cPickle.UnpicklingError
Error Value: invalid load key, ' '.

Traceback (innermost last):
  File D:\Zope\23229D~1.3\lib\python\ZPublisher\Publish.py, line 223, in
publish_module
  File D:\Zope\23229D~1.3\lib\python\ZPublisher\Publish.py, line 187, in
publish
  File D:\Zope\23229D~1.3\lib\python\Zope\__init__.py, line 221, in
zpublisher_exception_hook
    (Object: ApplicationDefaultPermissions)
  File D:\Zope\23229D~1.3\lib\python\ZPublisher\Publish.py, line 171, in
publish
  File D:\Zope\23229D~1.3\lib\python\ZPublisher\mapply.py, line 160, in
mapply
    (Object: manage_importObject)
  File D:\Zope\23229D~1.3\lib\python\ZPublisher\Publish.py, line 112, in
call_object
    (Object: manage_importObject)
  File D:\Zope\23229D~1.3\lib\python\OFS\ObjectManager.py, line 563, in
manage_importObject
    (Object: ApplicationDefaultPermissions)
  File D:\Zope\23229D~1.3\lib\python\ZODB\ExportImport.py, line 208, in
importFile
cPickle.UnpicklingError: (see above)

Can someone point me in the right direction. Both servers have the same
products installed.

I found the same question in this mailing list a few times, but no answers.

Tom