Unable to load .mot files

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sina morningstar
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Joined: Wed Jan 17, 2024 2:18 am

Unable to load .mot files

Post by sina morningstar » Thu Jun 27, 2024 2:00 am

I have an old model that was made with opensim3.3 and when I opened it whit opensim 4.5 it gave me a warning to change some of coordinates from rotational to coupled and I changed them in notepad++ and the warning got fixed. Now I wanted to load the motion files on my model but it gives me an error: "could not associate motion to current model"
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Thomas Uchida
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Joined: Wed May 16, 2012 11:40 am

Re: Unable to load .mot files

Post by Thomas Uchida » Mon Jul 01, 2024 11:09 am

Please see the "Upgrade Notes for OpenSim 4.0" page in the User's Guide (https://opensimconfluence.atlassian.net ... penSim+4.0). The bullet beginning with "If you are using models with CustomJoints" provides some information about this situation. Also note the following bullet: "Use the function updatePre40KinematicsFilesFor40MotionType() to fix older MOT files which would have incorrectly converted the units of some coordinates. This function is available in the GUI Scripting Shell, Python, Matlab, and C++." The documentation for the "updatePre40KinematicsFilesFor40MotionType()" function can be found here: https://simtk.org/api_docs/opensim/api_ ... d37b2810f3.
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