Error in executing Inverse Kinematics

[Kanishk Sood]

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Hello Everyone!
While executing the Inverse Kinematics tool on my scaled model I am getting an error, the text of which is in the messages pane in the file attached. Kindly explain this error and why has it come up. What can be done to run the IK tool successfully.
Thank You

[Thomas Uchida]

Kindly explain this error and why has it come up. What can be done to run the IK tool successfully.

This exception is thrown when evaluating the objective function (see https://github.com/simbody/simbody/blob ... r.cpp#L224). I believe this issue can arise when you are attempting to track the trajectories of zero markers, in which case the objective function is undefined. Please see Tutorial 3 - Scaling, Inverse Kinematics, and Inverse Dynamics (https://simtk-confluence.stanford.edu/d ... e+Dynamics) and the pages of the User's Guide that describe the Inverse Kinematics Tool (https://simtk-confluence.stanford.edu/d ... Kinematics).

[Kanishk Sood]

Thank you Tom for your answer.