I am using Logic Pro 10.1 and for some reason I've had a number of projects "lose" associated audio files. There doesn't seem to be any reason for this and i'm pretty sure this only started happening with the latest update. Files are all there until i reopen the project. Then logic flashes the "File not found" error message. I've been using logic since version 7 and i don't remember ever having this problem. I am saving sessions as a package btw.