<t>I recall trying models 4 and 9 (Schutte and Thalen I believe) and getting slightly different errors, but in the same general place, so I suspect the root cause is the same.<br/> <br/> Are you getting errors in RRA (with only generalized torque actuators) as well as CMC? If that's the case you may...

<t>Never did solve this problem completely. I'm developing a rat model and when I initially had this problem I had a couple muscles with approximately zero tendon length and modeled them with zero length. The musculotendon dynamics require dividing by tendon slack length though, so obviously that's ...

<t>I've been developing a rat hindlimb model with custom knee joints, using OpenSim v1.7. The model performs as expected through the workflow up until CMC, at which point I get the following error in what I assume is the forward integration step:<br/> <br/> rdCMC.computeControls: t = 0.23<br/> RKF.s...