Why is this preventing the app from launching?

2/5/11 4:01:34 PM
CNCRA3-launcher[1838]
*** NSThread: ignoring exception '*** -[NSArray objectAtIndex:]: index (-1 (or possib开发者_JAVA百科ly larger)) beyond bounds (0)' that raised during thread perform of target 0x6075f0 and selector 'buttonPressed_Play:'

This is what happens when I press the "play" button. What can I do to launch the app?

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I don't have ObjC background but apparently in buttonPressed_Play you call objectAtIndex with out-of-bounds index.