You can create video via Tools -> Generate Video

It seems like an issue with OpenSim, since I'm directly calling their API to compute the muscle moment arm: https://github.com/tgeijten/scone-core/blob/7222a3db04e022d11680c88ee0ed4a28b859b7c5/src/sconelib/sconeopensim4/MuscleOpenSim4.cpp#L166 This is beyond my reach, unfortunately. For in-dept supp...

You can't use SCONE directly for meta optimizations like that, but perhaps you can build something in Python that uses SCONE to perform the individual optimizations, using the SconePy interface: https://scone.software/doku.php?id=doc:batch This is something I would *not recommend* unless you know ex...

I looked into it, but I'm using the standard OpenSim API to compute the moment, moment arm and dof velocity. Is the moment, moment_arm or dof velocity also zero in your data?

Do I understand correctly that you want to run a meta optimization, i.e. run various optimizations to get the objective weights that lead to the best results? In that case, the weights for your cost function would remain constant during each SCONE optimization, and you would run another optimizer on...

Are you using an OpenSim model or a Hyfydy model?

I looked into it, and it appears that "target_body" in your example is actually the torso and not the pelvis. If I replace target_body with the pelvis body, the sagittal positions become identical to those from the GaitStateController.

Great, that looks correct.

Please note that you can also simply use grf_test:length() and gravity():length() to the lengths of these vectors.

The Effort is in Joules, while the MuscleActivation is a value between 0 and 1.

You should use "*/activation" (note the slash instead of the dot). Make sure you also correctly updated the names in the .sto file.