Saw this build Error in my XCode 6 project. ProcessInfoPlistFile 'couldn’t be opened because there is no such file.' Noticed that it was referencing a non existant .plist in myproject-etmdzgntrsozugsfwdahjbpsyjze folder. Cleaning (Cmd+Shift+K) and Option cleaning (Opt+Cmd+Shift+K) the project and then rebuilding did not fix it.
The project still builds and runs but that error is worrisome.