Hi Nick, I am getting a similar error when running the exampleMocoTrack.py script. I created a fresh python 3.11 env and conda installed opensim. Then installed opensim from the sdk/Python folder as you described above and added C:\OpenSim 4.5\bin to my environment variables. Still getting: RuntimeE...

Hi Ayman, I am realizing now I misspoke in my last comment. My hope is to only call track (not assemble) after the first frame for all subsequent frames. I am able to do so when I do not make any calls to updateMarkerWeight. However when I do update the marker weight I get the error: 'RuntimeError: ...

Hi Ayman, Thank you for the response! I am currently attempting to use UpdateMarkerWeight with the following code: ikSolver.assemble(s) for i in range(self.nFrames): # UpdateWeights for mark in self.marker_list: markweight = self.weight[mark][i] ikSolver.updateMarkerWeight(mark, markweight) # Set th...

Hello, I am interested in updating the weights assigned to each marker in IK at every timepoint during a trial using the python API and InverseKinematicsSolver. My current solution is to update the marker weights in the loop that is calling iksolver.track() for each timepoint. This solution seems to...

Hi everyone, I would like to read the geometry files from each body in a .osim file. Currently I am using the following lines of code. geom = body.get_attached_geometry(counter) mesh = osim.Mesh.safeDownCast(geom) mesh_file = mesh.get_mesh_file() This code stores the correct file in mesh_file but I ...

Hi Aaron, I am also interested in doing something similar, so thank you for this post! I was able to use the MuscleLikeCoordinateActuator.cpp and MuscleLikeCoordinateActuator.h here: https://github.com/opensim-org/opensim-core/tree/a01cf545485e8bc1f6e50b29ddeab229677de2c5/OpenSim/Sandbox/Moco/sandbo...

Hi Nick, That's good to hear that I should be able to use both! I am now trying to install OpenSim 4.3 in the Python 3.8 environment, but when I import opensim I get the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\OpenSim 4.3\sdk\Python\opensim\__...

Hi Nick, In the "Step-by-step instructions when using Anaconda with OpenSim 4.3+" it looks like you are required to use python 3.8 is that correct? Is it possible to run with 3.7? If not, does the installation allow multiple versions (i.e. would my current install work properly if I also install the...

Hi everyone, I am trying to add a MocoAcclerationTrackingGoal to an existing moco python script. However, I am getting an error in the line: acc_tracking = osim.MocoAccelerationTrackingGoal() I am able to instantiate other MocoGoals like MocoContactTrackingGoal using a similar commands but not Accel...

Hi Nick, The solution of setting the hand velocity to a high exponent seems to be a nice solution. Thanks! And Evan, 'linear_velocity' should be a Vec3 but I was trying to use it as an Output Goal so it was stored differently and I wasn't able to use the Vec3 operations. But I think I have a useful ...