A couple of weeks ago, I tracked guitars for "Hotel Desolation". I was really happy with the results. I was finished. Another song in the can. Just one small problem. Today when I opened up the session I got that nasty message - Audio file "main gtr#08" not found. Audio file "main gtr#09" not found. Etc. Etc. Etc.
For some reason, I deleted all the tracks BEFORE backing up the session. I'm not really sure what I was thinking. Very frustrating. Luckily, a rough mix survives on my iPod so I can figure out what I did and hopefully duplicate it.