I'm not 100% what is going on, but I can assume that you still don't have your OpenSim Library synced with Matlab correctly. Make sure to follow all the steps and run their tests. Otherwise, this is more of a question for the OpenSim team. I would suggest to double checking things and also making su...

The code works (just ran it)... do you have OpenSim linked to Matlab?
https://simtk-confluence.stanford.edu/d ... ith+Matlab
Jake Banks

You just run the Matlab script (don't edit it at all, so you should go back to the original). There will be a GUI pop-up that asks/allows you to manually select the model you want to create an actuator file for.
Jake Banks

Oh, and another thing.... if all your frames are the same just run SOpt for 1 frame.
This is not causing your 'over-constrained' problem, but it will save you A LOT of time!
Jake Banks

I believe you are not setting up your Reserve Actuators properly (or possibly neglecting it altogether). This has been discussed in other posts on the general OpenSim forum (concerning other models). https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=91&t=5476 To generate a proper actuators file, ...

Alejandra, Thanks for you interest in our model. Sounds like you are a new to OpenSim? At any rate, the best way to add residual actuators is to use the 'createActuatorsFile.m' that is now downloaded with OpenSim (and attached here). This will create a residual file (*.xml) accounting for every DoF....

Obidah, I'll continue to promote the OpenSim tutorials, documentation, and their forum. If you have already gone through the basic tutorials and read the documentation (as it sounds you have), I suggest >1 run through. Every time through you will learn something new (I still reference the documentat...

Thank you for your interest in our model. However, if you are interested in neck modeling, I would suggest you look at a different model that has been directly evaluated for the neck: https://simtk.org/projects/neckdynamics Our model has been evaluated for the thoracic and lumbar spine. To answer yo...

Opensim >4.0 comes with a nice Matlab function to generate reserve actuator files. Look in your PC's Documents\OpenSim\Code\Matlab\Examples for "createActuatorsFile.m" or see attached (if you downloaded <4.1). Note: I'm unsure if this function will work with 3.3.

I've actually recently had this same question. A work-around I found that seems to 'sort of' work is to take a SOpt output force file that matches your model and trial of interest and input all 0's into it and then run the JRR tool with that file. This 'seems' to give pretty decent body force estima...