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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/bin/ibtool failed with exit code 255
if any one knows solution please help.. thanks in advance.
In project build settings try removing the build settings for "Other Interface Builder Compiler Flags" (if -Wmost is set, set it to nil).
Project --> Build settings ---> Other Interface Builder Compiler Flags --> set to none(empty).
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 .
Relaunch XCode, then try creating a new project and see if the error persists.