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

This happened to me after deleting an unused target. It seems that Xcode put a space in my remaining target's CFBundleIdentifier (com.company.etc). I had to edit Info.plist with an external text editor to remove it and then it worked fine.