Command /Applications/Xcode.app/Contents/Developer/usr/bin/ibtool failed with exit code 255

Question

I am trying to run an application in iphone4 device but not able to build an app, getting following error :

Command /Applications/Xcode.app/Contents/Developer/usr/bi

Answer 1

I faced similar problem in Xcode 7.2.1 and spend 3 hr to figure out the exact issue .

Most of the answer dint solve my problem so thought to share solution here :

Applying wrong Constraint (either Autolayout or Size class) may produce this error , just go through the runtime warning by autolayout and fix it which finally solve uer bin - ibtool issue .