Command /Applications/Xcode-beta.app/Contents/Developer/usr/bin/actool failed with exit code 255

Question

It happens in new Xcode7 beta:

CompileAssetCatalog /Users/admin/Library/Developer/Xcode/DerivedData/InstaAd-ddgdnbxlpxipirebpndfmgrxspel/Build/Products/Debug-iph         


        

Answer 1

This error happened with me because the image name contained some unsupported characters (it was saved by Xcode as c71a25e%2FÍcone-XPTO Imagem - 120x120.png, even when placed in .xcassets).

Changing the image name solved this error for me.