[Zope-CMF] cb_dataValid - not allowed

[alan runyan]

Q: I am getting this exception.  in OFS.CopySupport .. it seems that
cb_dataValid should swallow any exception that is
raised.... anyone have any ideas?

File /home/zope/ZopeProducts/CMFCore/FSPageTemplate.py, line 163, in _exec
    (Object: folder_contents)
  File /home/zope/zope/lib/python/Products/PageTemplates/Expressions.py,
line 186, in _eval
  File /home/zope/zope/lib/python/Products/PageTemplates/Expressions.py,
line 143, in _eval
    (Info: folder)
  File /home/zope/zope/lib/python/Products/PageTemplates/Expressions.py,
line 336, in restrictedTraverse
    (Object: guest)
    (Info: {'path': ['cb_dataValid'], 'TraversalRequestNameStack': []})
  File /home/zope/zope/lib/python/Products/PageTemplates/Expressions.py,
line 354, in validate2
    (Object: guest)
Unauthorized: You are not allowed to access cb_dataValid in this context