Hi Ayman, I don't have any other actuators in the model. Is there anything else that could be causing zero muscle forces? By the way, when all the muscles are left in the model, static optimization produces reasonable results. It is only when I remove some of the muscles, that all muscle forces beco...

Hi, I am trying to remove some muscles from the Hamner2010 full body model. First I tried disabling the muscles from the navigator, but static optimization failed to run. I also tried reducing the max isometric force of the muscles to very low values (1-10), but again static optimization failed. Fin...