Here is the case. With JAM, I do not use much scenes anymore, but. For instance, I have on that is the beginning a a break or a bridge. SO I'm sure to have the good selection of pattern when going to the break without doing knots with my fingers. So, I have a rehearsal. I play the beginning of the break using the right scene, than I change patterns to go on to the end of the tune. But if I decided to change, anything in my song, I will save it of course. And here it happens : when I open my project next time and come to the break scene, its not the good one anymore, but the state where I was arrived last time I played. It would be good to be able to "lock" some (or all) scenes so when you save the project, the changes made in theses scene are not saved. There could be a warning when saving, like: "You have locked scenes in you project" and two buttons "save the actual state" and "keep locked scenes as they where before" I'm sure NI guys will find a much better formulation, but it's the idea.