Xcode: Build Failed, but no error messages

Question

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

Answer 1

Other answers helped me find the Report Navigator. The only error displayed was:

Build operation failed without specifying any errors. Individual build tasks may have failed for unknown reasons. One possible cause is if there are too many (possibly zombie) processes; in this case, rebooting may fix the problem.

I fixed this by closing the Simulator.