Lower Extremity Model (2 legs no torso)

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Michael Samaan
Posts: 12
Joined: Wed Jan 13, 2010 11:38 am

Lower Extremity Model (2 legs no torso)

Post by Michael Samaan » Wed Oct 29, 2014 11:24 am

Hi,
I am working with some previously collected gait data in which there is no motion capture data for the trunk. I am trying to use the default bothlegs model provided with OpenSim 3.1. The model runs through the scaling tool successfully but I am unable to run the model through RRA or Static Optimization (SO). When trying to run RRA or SO, I receive the following error:

SimTK Exception thrown at SmallMatrixMixed.h:878:
Error detected by Simbody method lapackInverse(Mat<>): Matrix is singular so can't be inverted (Lapack getrf info=3).
(Required condition 'info==0' was not met.)

Any help or information that can be provided would be great!

Thanks,
Mike
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jimmy d
Posts: 1375
Joined: Thu Oct 04, 2007 11:51 pm

Re: Lower Extremity Model (2 legs no torso)

Post by jimmy d » Thu Nov 06, 2014 8:49 pm

Hi Micheal,

there is a similar post that may help you;
https://simtk.org/forums/viewtopic.php?f=91&t=4242

-James
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