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 encountered this problem with Xcode 9.1 for both simulators and devices, and my running scheme was already set as profiling with "Debug". Finally found this Apple forum discussion very helpful and got the problem resolved. In short, the solution that worked for me is ... Restart the Mac.