iOS simulator: could not hardlink copy. Wrong path in my filesystem?

Question

I am using Xcode Version 6.1 (6A1052d)

I am trying to launch an app on the simulator.

The first time it always works fine. If I want to launch a second time,

Answer 1

I faced this error while leaving Build field blank using only Version on General tab. The error has gone after setting a build value and reinstalling the app.