Build app with Xcode 4 - it always show some error about PNG image

Question

When I build my app with Xcode 4 it always show this error message:

CopyPNGFile /Users/michaelchen/Library/Developer/Xcode/DerivedData/iMusicBox-boeawugacmha         


        

Answer 1

in my case with xcode 4.5 the problem is solved by permission giving with terminal

chmod -R +rw /yourprojectpath/yourprojectfolder

this is maybe not the best solution because of locking files with file sharing. But will do if you are in hurry.