I had the same issue recently. I hadn't used my OFT in a while, so when I plugged it into my pc it download a bunch of updates - after which I got the error.
Waiting 30 seconds, then retrying - didn't work for me.
FIX: Plugged it into my car, read the ECU data (obviously don't write to ECU), then replugged into my pc again. OFT downloaded a bunch more updates, but at the end - no error.
