Latest Unity version debug error in iOS

For my iOS version of game, I have exported xCode project from it.
I want to debug some values on screen but when I press play button on xCode after some time I got following error in xCode and can’t able to debug values on screen.

Same time game can’t able to run on device. I have to close game on device and reopen again it for play. At this time game run normally with out any problem.

But main problem is that I can’t able to debug values on screen.

Unity Version : 4.6.9f1
xCode Version : 7.0.1

Detailed error message in following image :

I also highly recommend this Asset from the store: