Sorry for the new post, but if you want more information, this is what I see on the screen when the simulation is "running" : Also my IK datas and grf datas seems to be ok so I really struggle to understand why the interface is freezing. Is it because of a not powerful enough computer ? Mine is pret...

What is said in the Messages window? Most likely, the optimizer is looking for a solution and cannot find one. You can change the integrator settings in the Static Optimization Setup File. Maximum number of integrator steps, integrator tep size, error tolerance, can all be changed and may help. Abs...

Hello, I try to compute contact knee forces and compare them to in vivo forces for many gaits. As I try to get a more subject-specific model in order to make better predictions, I use the more complex model created in this paper http://www.sciencedirect.com/science/article/pii/S0021929014007179. Thi...