Newton relaxation too small ERR

I have a problem in GLE model(inverse) err
err : Newton relaxation too small
attached pic

I don’t think what means this err

always thanks your help
Have a nice day~

You are not running inverse, you are running the MotionAndParamterOptimization, or?

Have you cahnged the C3D? Have you checked the initial position? Have you chaecked all markers?