I managed to update the code to OpenSim 4.0 and contacted the author of the plugin.
So, there is an updated version (contactForces4.0) on the project page that works with OpenSim 4.0: https://simtk.org/projects/statopt-contact

Hi James, thank you for your remarks. Unfortunately, I have no access to the original SIMM model but only to some data collected using that model such as IK, ID, SO, end-effector positions (hand). So, I cannot compare the two models by myself and have to rely on the information that they should be s...

I found this thread about unilateral dynamics: https://simtk.org/forums/viewtopic.php?f=91&t=4347. So, the residuals at the thorax computed by ID are real in case of my partial model (right arm) and reflect the reaction loads of the unmodeled parts. I wonder if it is possible and sensible to compare...

Hi everyone, I'm trying to reproduce some static optimization results for pointing movements using the recently updated dynamic upper limb model https://simtk.org/home/upexdyn/. The reference data consists of the IK, ID and SO solutions computed with a SIMM model quite similar to the mentioned OpenS...

The model has been updated recently (https://simtk.org/home/upexdyn/) and SO now works fine for me.

Hello everyone, I'm new to OpenSim and try to run a static optimization for pointing movements using the following upper extremity dynamic model https://simtk.org/home/upexdyn. I have worked through the SO tutorial and added reserve actuators for all coordinates, i.e.: <CoordinateActuator name="elv_...