Xcode 5.1.1 Simulator in Use error display when simulator is not used

Question

Ever since I downloaded the update to Xcode 5.1.1 I keep getting this error message more often then not when my simulator is not in use and even when I quit the simulator:

Any idea anyone?

Answer 1

What eventually fixed this problem was upgrading my OSX to Mavericks.

Answer 2

Force quit your simulator as well as you xcode

Press: Command +option(alt) + ece

Quit Xcode and iOS simulator

Restart xcode

Hope your problem will solved by this.