Hi to everyone!

I need to obtain the tendon force of certain muscles of the right upper limb after that the subject exerted a force. I found out the Anlyze tool of OpenSim gives as output a file with the tendon force obtained applying external forces but to run this tool I need a file I can't write.... This file can be obtained using Computed Muscle Control tool, I tried but it continues saying "SimTK Exception thrown at InteriorPointOptimizer.cpp:261:

Optimizer failed: Ipopt: Infeasible problem detected (status 2)

OPTIMIZATION FAILED...

CMC.computeControls: ERROR- Optimizer could not find a solution.

Unable to find a feasible solution at time = 5.

Model cannot generate the forces necessary to achieve the target acceleration.

Possible issues: 1. not all model degrees-of-freedom are actuated,

2. there are tracking tasks for locked coordinates, and/or

3. there are unnecessary control constraints on reserve/residual actuators."

I can't reach a solution...

Can you help me?

Thank you very much!

Anna