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, I had to remove all PNG files from the folder and then re-adding the files again without drag-and-dropping the images into the Xcode UI (under Launch Images). The latter was key in my case, first adding the files to the folder and then dragging them into the UI somehow cause a duplicate which screwed it all up. Try that out if nothing else's working for you.