TestExecute displays this message if it is unable to detect an Android virtual machine by the IP address that you specified in the Mobile Troubleshooter.
There are several possible causes for this --
Check whether your virtual machine is on.
Check whether your virtual machine emulates a network adapter. For more information, see the virtual machine documentation.
Ask your system administrator for help determine whether the virtual machine is available in your local network.
The specified IP address does not correspond to your Android device. Make sure you specified the correct IP address.
You did not call
adb connectto connect the Android device to the instance of Android Debug Bridge running on your computer.
Check whether firewalls running on your computer or in your network allow access from your computer to the tested virtual machine.
Ask your system administrator for assistance, if needed.