I was about 40 minutes into an interview with sound being recorded on my Tascam DR100 when the battery died. The file seems to be lost. There's a 0 kb file that shows up, but it doesn't play on the recorder, and when I copy the entire card to my computer it's still a 0kb file. Am I hoping against hope that there's someway to retrieve that file? I even ran a data recovery program to see if there were hidden files, but that didn't seem to work either. Are there any ways to retrieve those files? This is terribly disappointing, especially since the backup internal battery was fully charged at the time, but it was the AA batteries which ran out and caused the recorder to power down without warning.