I'm almost at my wit's end (again). I have several very simple ZClasses (*none* of which are subclassed from CatalogAware). The "Basic" tab shows them all to be subclassed from "ZObject, ZObjectManager". Recently I posted asking how to implement copy/paste programatically. It turns out this was somewhat premature - I can't even get this to work via the management interface, all of my ZClass instances reporting that "object X doesn't support this operation". One of my ZClasses doesn't even allow renaming, throwing the same error as above. In all other respects the classes work as expected. This is happening on a number of Zope platforms (irix, NT, Win98) with versions of Zope everywhere from 1.61 to 2.2 which leads me to believe that I'm doing something fundamentally wrong. Any ideas are much appreciated - I'll even send along an exported ZClass to anyone willing to investigate the source of my error on their local machine. Cheers, Darran.