Nick, Thank you so much for your reply! That is exceedingly helpful. I was not aware of that branch, but it's the perfect starting place. If I do end up implementing scaling properly to solve one or more of our problems, I will definitely try to contribute it to the project along with the example. O...

I'm wondering if anyone knows of a good way to scale the states controls (and bonus points for kinematic constraint lagrange multipliers) in a MocoProblem? I am working in a branch of the source code but I can't figure out the best place to add in scaling to improve the problem formulation I am work...

Jiacheng, Thank you for writing this out! Your instructions were very helpful and probably saved me a bunch of time troubleshooting myself. Doing exactly as you described, I was able to solve the problem in both MATLAB and C++. To add to this, for anyone else that is interested, I have included my M...

Thank you for your comments Ross. Yes, the studies from Handford would be one example of such asymmetry. It looks like I will have to come up with custom goal and constraint solutions for this. I wanted to post to the forums to avoid getting too far into it only to find out that someone else was alr...

I'm working on a predictive gait simulation problem for which I would like to use an asymmetric MSK model. The simplest example of this would be, for example, a model with a larger tibia body mass on the left side versus the right side. However, to keep the problem simpler, I would still like to enf...

I think we could have a very long and productive thread discussing this question. I thought I would just add a few of my own thoughts -- as much so I can organize them as to contribute to the discussion. The central question in optimization (and that is what gait prediction is based on -- optimizati...

Thank you for the suggestion! That did the trick. I don't know if the way I did it is the best way to do it, but basically I just created a ground link and attached that to one side of the mechanism, and then another ground link and attached that to the other side. Then I used WeldConstraint to clos...

Yes, I am building the model programmatically. It's a simpler test case of something I am working on. I have attached a ZIP file which contains the OSIM file, an M file for building that OSIM file, and an M file for the MoCo problem. FourBarLinkage.zip I'm most suspicious that there is a simple addi...

I'm wondering if anyone has experience with this error and can guide me to resolve it. This is sort of the simplest version of the problem that I am encountering. Let's say that I want to build a four-bar linkage in OpenSim and solve a minimum effort point-to-point movement (torque actuator on one j...