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iOS Build a Simple iPhone App (iOS7) Animating and Intercepting Events Image Based Animation

SIGABRT Error

After completing the steps to animate the image, I tried to run the animation and as soon as the build succeeded, it collapsed saying:

Thread 1: signal SIGABRT.

The Error console message was:

2014-04-07 19:12:57.793 CrystalBall[11525:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -.

Can you please help me?