ok i think ive found the problem.

Im no rigger so dont take this as gospel, but using my common sense i read the warning msg when i tried to animate and like i said it, the problem lies with joint 8.

Joint 8 is the character's lower back. After playing a bit more. I also discovered that you didnt freeze transformations on your control curves. So when i reset all the values to 0, i got another warning message and your curves went crazy.

My advice? This is a stab in the dark, but i advise you to re-rig, or go as far back as you can and re-constrain all your curves to your joints,....but THIS time freeze all transformations first.

It wouldnt hurt to name your joints to. But thats your call. lol


Good luck and repost if you resolve it. It be interesting to know what it was causing the problem