missing audio data block file(s)

I have recorded my students speaking exam using Audacity. However this particular file won’t open. Even though it says 12KB. I absolutely need to be able to recover this data. What can I do please?
i am using Audacity 2.0.0, and Windows 7 Professional (at school)
thank you very much for your help

Audacity can produce a Project which is an AUP text file and a _DATA folder with the show in tiny pieces. These only open in Audacity. Audacity will also Export standard sound files like WAV and MP3.

It sounds like you saved a Project. Did you leave the AUP file and the _DATA folder in the same place? They need to see each other for the show to open.

12KB is not enough data for a show. Is that the size of the AUP file?