Xcode 6.1.1 (null) cannot run arm64

Question

I'm running app on iPad 3 mini device. All of sudden I'm getting (null) cannot run arm64 message and build fails. I'm using OS X 10.10.1 and Xcode 6.1.1. Why this message?

Answer 1

I was using a non-apple cord and it somehow disconnected in between starting the build and running, so the device changed from my iOS device to a "Generic iOS Device".

Try reconnecting the device or a new cable and running again.