XCtrace does not support multiple devices connected to launch an app

Hi, I am using xctrace to launch an app and check if the app launched successfully or crashed by reading the content of the .trace file. However if multiple devices are connected , xctrace complain No devices found matching the identifier specified. Please let me know if there is any limitations for the device to be connected.

XCtrace does not support multiple devices connected to launch an app
 
 
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