When I first saw this thread I was thinking of replying with the same reply, but I got the same error when using the HTC provided plug, plugged into the wall and since it's a single unit, you can't confuse it for a different device that can double as a USB cable. I still managed to get the same error. I turned off my Wifi, and exited a few programs and then disconnected and reconnected the device. That seems to have resolved the issue.