WAV file - recording worked, not able to playback

Hello-

I made two recordings with the Marantz PMD 661 last night and one turned out fine while the other one did not.  I used the same recording settings for both (PCM-24, Stereo, sample rate 44.1k).  This device uses the SD card with 1 GB of memory.  When I transferred the two files to my computer, I was able to play the first recording back but the second recording, though appearing as 392.4 MB of information, has a duration of 00:00.  Is there any way that this information is salvageable?  What went wrong here?

The second recording did stop because the card ran out of room but I don’t see why that would effect the material that had already been recorded.  Please let me know if there is any solution to this mess.

Thank!