So after some too-late coding and placing my NSLogs in the wrong
place, I now find the normal Multiple Validation Errors. After dumping
the extra messages in NSDetailedErrorsKey I see the offenders are
items that are marked as transient but non-optional. They're set in
my entity's awakeFromFetch but since my entity class isn't used during
migration, these fields were never getting set. As non-optional,
that's a validation error.
Setting those transient fields to optional made the migration work.
Yippee!
Now when I save my document I get a sheet saying, "This document's
file has been changed by another application since you opened or saved
it", and asking if I want to save or not. Eh? What's that all about?
Someone else had the same warning: http://lists.apple.com/archives/applescript-users/2008/Feb/msg00401.html
but no answer was offered there.
Any clues?
Graham.
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