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I am having troubles integrating XMPP on my iOS Project using Xcode 4.4 under Mac Mountain Lion OS X. I followed every step but I got stuck with this problem:

Command momc failed with exit code 1

See screenshot:

I have deleted all the .xcdatamodel files, clean and re-build the project, but the error is still there.

Cœur
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emmandroid
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5 Answers5

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Ok. Solved it. You have to delete the *.xcdatamodel files on the Xcode project. (Right click > Delete).

emmandroid
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    Same. I deleted the .xcdatamodel file and reimported. – Andrew Davis May 08 '14 at 10:06
  • I had this after moving the file to a different directory. No amount of deleting derived data/clean builds would fix it - I had to delete it from the project, clean everything and then re-add it. – Echelon Sep 05 '14 at 10:40
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    Follow-up: it still came back a few builds later. I had to do this: http://stackoverflow.com/a/25686846/337392 – Echelon Sep 05 '14 at 13:21
3

Check if you have empty .xcdatamodel folders inside .xcdatamodeld. This may happen due to git behaviour for example.

szotp
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Maybe the problem is iOS/iOS Simulator version! If you don't delete the *.xcdatamodel for git, you can try replace iOS/iOS Simulator SDK or update. My problem is resolved in this way.

enter image description here

Community
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shuiyouren
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0

Face the same problem

I just created new model with new name and copy all the entity from old model and paste in new model and deleted old model, it worked

Mohammad Parvez
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0

This also can happen when the project is first compiled on a newer version of xCode (beta versions for example) and then trying to recompile with the original version.

Jeremie D
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