It is almost like there is a buffer underrrun or something. The file abruptly quits, but a new file named T01A, T02A, etc are made. They are not not seamless either. My 722 apparently just stopped when it errored out finally (I didn't see this happen, but saw the files the next day when I got the recorder back). pilgrims622 744t continued recording but exhibited the same file naming scheme for no reason with some dropped samples between. I always format test etc before a show, so not sure why it happened. Definitely not something that could be repeated I don't think. So far, I have had 0 errors personally while recording with my 722.