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

Can't believe for me it's solved by just restarting mac :O

Answer 2

For me quiting Xcode & Simulator(Reset) and restarting Mac Resolved.

Answer 3

1. Exit both Xcode and simulator
2. Delete Derived data [Right click on finder and select "Go To Folder" Type ~/Library/Developer/Xcode/DerivedData/ in textbox. it will redirect you to DerivedData folder.
3. Delete all folders inside it.
4. Relaunch Xcode and Run your project again.

your issue will be solved.