Hi, Nick.

Culprit was found! In my marker file, some unused markers had their names with initial character '*'.

Many thanks,
Linjie

Hi, Nick. Thanks for your suggestion. But the error was there when I had already put all needed files in the same directory. If I am correct, I didn't use absolute paths in those files just as you did for the example files. I've also tried searching invalid characters in the model, input and the mat...

Hi, Nick. The script failed at the line of sovling 'solution = track.solveAndVisualize();'. The message was in the attached. I will attach the input data files and the model (too large to send through in this forum, but its just Rajagopal model with different marker names) to you via the email as we...

Hi, Nick. Thank you very much for your reply. Yes, I can load my model and input data (marker trc file and GRF mot file) in the GUI and can successsfully run through IK and ID analysis. Not sure if the problem was caused by the model conversion from OpenSim 3.3 to OpenSim 4.4? Just tried the convers...

Hi, there. I'm trying Moco track in hope of getting a better dynamic consistently matched IK result. I tried the exampleMOcoTrack m file, it worked well and seem to get the outputs I am looking for. However, when I changed the osim model, grf and marker trc files into mine, I got an error message sa...

Hi, Can I ask how to turn off the use of muscle physiology during the static optimization please? I've tried both Api and GUI to toggle off the use of it, but I still constantly got the error message about some muscles unable to equilibrate. I'm using the latest version 4.4, not sure if this is the ...

Hi, there. Can I ask if someone tested the human knee reacion force during squat or ever used he data from Grand Challenge Competition to Predict In Vivo Knee Loads? I want to use experiment data to compare with my FEA analysis result, but found the data (screenshot below) from Grand Challenge Compe...

My bad. I misunderstood the meaning. Thanks a lot, Tom! Thanks

Hi, there. I am trying to use joint reaction analysis to get the ankle forces and moments. In the settings, there is one to input the frame name in 'express_in_frame'. However, whenever value, for instance, 'ankle_angle_l' or 'knee_angle_l' in the <Coordinate name=>, the output result always gave th...

Hi, there. I want to use the mesh geometries of self designed total knee replacement (non-comformity) to predict knee forces. I have successfully calculated the Inverse Kinematics, Residual Reduaction Algorithm and Computed Muscle Control without consideration of mesh geometries. However, when it ca...