I have been working on a 1000 frame animation using the Norman goon rig, ...and I was already aware that errors occurred when re- opening but didn't take it too seriously until I began noticing 1 control after another was no longer there.then at the end of the animation literally only 5 controls were left.

Im working from my windows laptop. I did attempt to render, it didn't work. Does anyone have any suggestions? or can I import a fresh rig into the scene? delete history? just dont know heres a screen shot of the problem.