I have some animations and save it, but on the next day when I wanted to continue it, some of the animations are missing. Luckily, I saved it as Maya ASCII, but unfortunately I'm quite new in maya and haven't touch MEL or scripting yet. I'm not new to programming though, so I think I can understand quickly.
But the urgent thing is to fix the file now, so I want to trace the ASCII file and figuring out at which point the animations/keyframe are missing (or unloaded). I tried to read it, but cannot find setKeyframe command. Is it translated to different command? If so, what, and usually where? (after what or before what) Btw, this is maya 2013
Googling it didn't help either. I can only found Maya ASCII file organization in 2010, but not 2013 (I cannot find it in user guide). So, any help please?

Thanks