Why am I getting ibtool failed with exit code 255?

Question

All of a sudden I can\'t build my project. I get the following compiler error:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.pl

Answer 1

In my case it happened after renaming some namespaces and I solved the same issue going to the projects properties > APPLICATION tab > Default namespace : giving the new correct namespace.

Of Course I changed the namespace also inside the classes, but this will help because will fix all auto-generated files. Clean and build is recommended and eventually close and reopen the solution.