hi
good luck recovering your file. i had a similar problem on this past friday nite. after the show, i turned off the V3 which was feeding a digital signal to the mt24/96. it was my error for sure. i dont recommend turning off the v3 while the mt is recording.
anyway, when i later tried to transfer the file from my mt to my cpu, it wouldnt transfer, citing a faulty file type. it suggested running checkdisk (chksk).
i ran checkdisk with the fix function. this allowed the file to be transferred to my cpu, but it wouldnt open in cd wave, wavelab or winamp. i opened up the file in a hex editor and found that there was no header information.
i made a copy of the original transferred file, and i tried running audiohack, but it didnt weem to do anything, and even came back with a message that the header was messed up and it was missing a data chunk.
i then tried the header repair program posted by 'pigiron' in this link
http://taperssection.com/index.php?topic=72936.0iand it repaired the header info, and made the file readable in cd wave, waveleb, and winamp.
it was then business as usual.
i hope this helps. and again...good luck retrieving your file...dont turn off your V3 before stopping your recorder.