Build fails with “Command failed with a nonzero exit code”

Question

When I try to build my app with Xcode, an error interrupts the build process:

Command CompileStoryboard failed with a nonzero exit code

Answer 1

When you stop building a project when the compiler is in the middle of something "important", this error could appear. In that case, building the project again and letting it finish normally makes this error disappear.