Xcode 7 - Code coverage data generation failed

Question

When I run my tests I get an error:

Code coverage data generation failed.
Unable to retrieve the profile data files from \'UIDevice\'.

Answer 1

Carthage users:

This happened to me after I added a new framework to my Cartfile.

I ran carthage update but forgot to drag the .framework file from Finder into the Embedded Binaries section of my app target!

Once I did that, the problem went away.

(Note this is a specific case of the general problem mentioned by @Mustafa above.)