DTAssetProviderService could not start DTXConnection with Simulator

Question

After updating to Xcode 7.3 I am not able to run my app in the iOS Simulator.

On every attempt I am getting the following error message:

DTAss

Answer 1

I quit my Xcode and Simulator then opened my project and ran again, it worked for me. But I dont understand what kind of error and why it occured.