Well, it looks like, since the 661 has a repair function, and I USED the repair function, the headers were written, and so the last hour is gone. I guess it's why I make backups! Funny thing is, the recorder was running, the display said it was still recording when I looked at it, then I shut off the v3 and the error appeared instantly. So I would have thought the file could be saved, instead the error 22 just kept the machine locked until I shut off the power. When I turned back on and played/repaired the file it was short. I wouldn't have thought that could happen, but the repair function must have closed it somewhere earlier in the file.
So I guess the lesson is: when going digital in, turn off the 661 before the device that feeds it!