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

After all the suggestions also I couldn't get rid of this issue. I was getting this issue after my OS was updated.

It worked for me when I started removing xcode caches. Specifically removing ~/Library/Caches/com.apple.dt.Xcode ~/Library/Caches/com.apple.dt.Xcode.ITunesSoftwareService ~/Library/Caches/com.apple.dt.Xcode.sourcecontrol.Git

I had to though remove and add needed simulators