Xcode 4: Build Failed, No Issues

Question

The app works fine in the simulator, builds and runs.

When I attach my device (iPhone 3GS running iOS 4.3) and target the iPhone, the result is \"Build failed\" with

Answer 1

I faced similar problem in XCode4.5 and while working on my application XCode suddenly crashed.

After searching for hours, I found out one of my file in my application got deleted when xcode crashed.

I restored the file from Trash and issue got resolved.