Xcode4: two entities with “required” relationship … failing to be maintained by Core Data?

I haven't seen the problem you describe and I've created several data models under Xcode4. It appears to work just like it did in previous versions in that regard. I think you've got something else going on.

Xcode 4.0.2 seems to have fixed the problem - everything works as expected now, with no changes to code :).

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