I'm trying to do a Core Data migration. I've got my .xcmappingmodel,
I've created a new version of the MOM, and both are under the same
xcdatamodeld. When I launch my application, I get the following error:
"Persistant store migration failed, missing source managed object
model." A little googling revealed that it's the error in the subject.
Clearly I have something misconfigured, but I can't figure out what.
I've tried various combinations of checking the "target" box, and that
does nothing. Somewhere in those attempts, I apparently lost the
ability to set the current model version to the new one; if I try, the
check mark goes away from the old one, but doesn't appear on the new
one.
Any help would be very, very much appreciated.
-Daniel
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