Xcode: Build Failed, but no error messages

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Using Xcode 4.5.1. Our project has been building fine for the last three months, but suddenly, when I try to build, it says "Build failed", but does not show any errors on the triangle exclamation mark tab, nor does it give a reason when it pops up build failed.

We have not changed the bundle identifier, or any other project properties. I tried a clean, then build, but no luck.

What may be causing the problem?

Similar to this question, but none of the solutions apply.

Best Answer

Figured it out. On the tab with three lines in a speech bubble, it shows a build log. I guess my storyboard file had become corrupt during the last git pull.

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