1) you're posting to the wrong list: I suspect you should try to post
to plone mailing list, where you will find more useful responses;
2) it looks like the Plone you're using is not matching the ZCatalog
in Zope: did you say you installed a new version of Plone? Most
probably, it is not compatible with Zope 2.7.8.
Zope maillist - Zope@zope.org
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