"Can't find ECU..."

I was working on a car today, one that I have worked on before, started having trouble when I re-flashed, (write calibration only), I kept getting the error message, "can't find ecu, make sure ignition is on, cable plugged in" or something to that extent, plus occasionally when scanning, it wouldn't work either, got a message, "unlicensed cable" or something. Stopped, unplugged, replugged all the connections, got it to work again. Any ideas?:shrug:

Contact support with a screenshot of the error message you are seeing if you get it again.