Unable to install app in simulator xcode 9 beta

Question

I downloaded Xcode 9 beta recently, and when I tried to run my app in the simulator it is not getting installed. I am getting this error in my Xcode every time I try to run

Answer 1

This issue could be triggered by multiple things however if you take a look at the logs at ~/Library/Logs/CoreSimulator/CoreSimulator.log and it states an error that reads :

NSUnderlyingError=0x7fb51c271ee0 Could not hardlink copy /originPath to /destinationPath

it's possible that your Build number in your Project Target's settings is set to empty.

Go to Project Target > Identity > Build and set a Build number. You'll have to uninstall the the app in the simulator and re-install it before installing updated versions.