Your screenshots indicate that you have attempted to run a 1-second dynamic simulation of this model. As I pointed out above, this particular model has no inertial properties (which are essential to run a dynamic simulation). However, you can still use the Forward Dynamics Tool to generate a .sto fi...

Please see the User's Guide for help using the Forward Dynamics Tool (http://simtk-confluence.stanford.edu:80 ... amics+Tool). If you are still encountering issues, please provide detailed information about what you did and what happened.

The model you have indicated was created in SIMM, so you will first need to import it into OpenSim (File -> Import SIMM Model…). You can then use the textboxes and sliders in the Coordinates window to pose the model. Depending on your application, you may also want to create a .sto file containing t...

If I understand correctly, you are trying to modify muscle paths. Please see the documentation on via points and muscle wrapping (e.g., http://simtk-confluence.stanford.edu:80 ... l+Modeling, Question 2).

Hi Mohamad, Click on the ellipsis ("...") button beside the ActiveForceLengthCurve property and double-click the value beside "shallow_ascending_slope". Note that "shallow_ascending_slope" is a property of only the Millard2012EquilibriumMuscle model. Also note that the specified value must respect t...

Hi, Margaret. The force-length relationship for the active element is described by the active-force-length curve. If you are using the Thelen2003 muscle model, adjusting the KshapeActive parameter will change the shape of the Gaussian used to model this relationship (see the attached image). KshapeA...