This happened to me, and the problem I ran into was a circuit. The goal was correct, but 64-bit was chosen as the architecture instead of the 32-bit version for the 32-bit project. As soon as I made the switch, it started working again.
GDB had the same problem, but it did not report it so elegantly, instead it reported "warning: posix_spawn failed, try_pp, error: 86". He launched the application, but could not debug it.
This can be easily done if you are debugging a project without creating a scheme, or if the scheme switches to you due to an external change to the project file (updating or returning the original repository using git, svn, ...)
source share