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

I fixed the error with this command, close the simulator and Xcode:

codesign -vv /A*/Xc* | open -ef

Hope that helps.