I was able to get it working with modifying your Python code. Thanks!

I will try updating my code with that and see if it works. I do have one question is the "reserve file" that you have as an input to your opensim.ForceSet is that a xml file defining your reserves?

I trying to perform static optimization in MatLab with the analyze tool but I am having difficulties applying reserves with the set force file command. It will print the correct path to the force set file in my setup file but it is not actually using the reserve file when running static optimization...