2008-05-19 22:25:46.990 moolahcoredata[664:10b] Cannot perform operation without a managed object context
I just tried to replicate this and got this error when the tree controller wasn't bound to the moc and 'prepares content' is selected. This, of course, would fail as the controller is trying to execute the default fetch request (with any fetch predicate you've specified) but has no knowledge of the moc with which to perform the fetch.
So your selection is nil as the tree controller has no content. (AFAICT) Jon
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