Results very close to reference model

[ghost]

Hello, I am trying to use the Opensim GUI version of this tool to find muscle parameter of Upper Extremity Dynamic Model (https://simtk.org/projects/upexdyn). I have 15 muscles of interest for this model. When I run the tool, for some reason the optimized model shows exactly same Optimal Fiber Length and Tendon slack length as the reference model (Example: For DELT1, Optimal fiber length for reference model: 0.0976 and for optimized model its 0.097599999999997, so exactly same). I'm not sure what I'm doing wrong. Can someone please help me with the issue?

Thanks.

[modenaxe]

Hi @stahmid7, the tool optimises the musculotendon parameters on a model personalised through scaling (or newly generated), so the parameters would be very similar if the scaled model has anthropometrics similar to the template. Is that the case?
Also, which version of OpenSim are you using? We have not updated the GUI tool in a looong time, it's great if it still works!

[ghost]

Thank you for your response. Yes so turned out the the model anthropometry was surprisingly closed to the subject. So I tried with new data for another subject, and the results got better.
I'm using the opensim 3.3 to use this tool since it doesn't work with the latest version.

[modenaxe]

Hi, can you please post an issue?
Have you tried using the code in the OS4 branch?