Model help - compatibility with opensim 4.1

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Alexander Bush
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Joined: Fri Nov 15, 2024 4:46 am

Model help - compatibility with opensim 4.1

Post by Alexander Bush » Tue Feb 11, 2025 5:40 am

Hi,
I am trying to open this model in opensim 4.1

https://github.com/julieemmerson/opensim_tennis_model

However I am getting the following error:

Attempting to assign an invalid SimTK::MobilizedBodyIndex
In Object 'spine_geom_frame' of type PhysicalOffsetFrame.
Thrown at PhysicalFrame.cpp:73 in setMobilizedBodyIndex().

The model loads perfectly in opensim 4.5 and I can't work out what the problem is.

How can I modify the model to work in 4.1 please?
Thanks in advance.
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Windows
OpenSim 4.1
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Carmichael Ong
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Re: Model help - compatibility with opensim 4.1

Post by Carmichael Ong » Tue Feb 11, 2025 6:48 pm

The citations from that GitHub page include a reference for Seth et al. and the Scapulothoracic joint, and the ScapulothoracicJoint was added in OpenSim 4.2 (https://opensimconfluence.atlassian.net ... penSim+4.2).
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Alexander Bush
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Re: Model help - compatibility with opensim 4.1

Post by Alexander Bush » Tue Feb 18, 2025 8:55 am

Thank you, I missed that. Makes sense.
Best wishes,
Alex
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