Can't launch my app in Instruments: At least one target failed to launch

Question

I have all my code signing entitlements set correctly. Running the app on my phone is fine, but launching it in instruments gives me an error message:

Error          


        

Answer 1

I realised what "At least one target failed to launch" means. It appears that both the development and release schemes (if you have a debug scheme and a release scheme) must have a development identity.

I had the debug scheme selected when running the profiler and the message at the top of XCode said "Running debug". However, it seems that this is not sufficient.

I changed my release scheme code-signing identity to be the same as the debug scheme (and also the provisioning profile), and the problem went away.