Images.xcassets: error: Could not find a suitable device for type SimDeviceType

Question

When I tried to run the application in simulators, I am holding Xcode 8.3.2 and Xcode 9 beta 1, and my project is running in Xcode 8.3.2. I got the following errors.

Images.xcassets: error: Failed to find a suitable device for the type SimDeviceType : com.apple.dt.Xcode.IBSimDeviceType.iPad-2x with runtime SimRuntime : 10.3 (14E269) - com.apple.CoreSimulator.SimRuntime.iOS-10-3 Failure Reason: Failed to create SimDeviceSet at path /Users/Mac/Library/Developer/Xcode/UserData/IB Support/Simulator Devices. You'll want to check the logs in ~/Library/Logs/CoreSimulator to see why creating the SimDeviceSet failed. Underlying Errors: Description: Failed to initialize simulator device set. Failure Reason: Failed to subscribe to notifications from CoreSimulatorService. Underlying Errors: Description: Error returned in reply to notification request: Connection invalid Failure Reason: Software caused connection abort /* com.apple.actool.document.notices */ 

Answer 1

I had this error and it was resolved simply by opening Simulator from the Xcode menu.

Xcode → Open Developer Tool → Simulator

As soon as the simulator was open and finished, I cleaned and rebuilt the project.

Answer 2

Try to clean the project and then run it, which I did

Go to product> Clean and then run

Answer 3

For me, this did not help cleaning. I had to run sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService and then I was able to run the application through the simulator