Have you checked if XapDeployCmd.exe complies with the directive on your path to the environment?
If you cannot add the whole path, for example: C: \ Program Files (x86) \ Microsoft SDK \ Windows Phone \ v8.0 \ Tools \ XAP Deployment \ XapDeployCmd.exe / installlaunch D: \ PhoneApp1.xap / targetdevice: XD
I would also check if any emulator is installed
Meir gerenstadt
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