casVector error thrown in exampleMocoTrack.py

[Riley Edmonds]

Hi there,

When trying to run the Moco example script, exampleMocoTrack.py included in the OpenSim docker container (https://hub.docker.com/r/stanfordnmbl/o ... st_updated) it seems to throw an error stating:

```std::exception in 'OpenSim::MocoSolution OpenSim::MocoTrack::solveAndVisualize()': casVector should be 1-dimensional, but has size 0 x 0.
Thrown at MocoCasOCProblem.h:108 in convertToSimTKVector().```

I am unsure why this is being thrown and/or how to correct it, especially since this is in an example script. I would appreciate any feedback on the issue.

Cheers,

Riley

[Nicholas Bianco]

Hi Riley,

Thanks for pointing out this issue. I've seen this issue before (usually has something to do with the initial guess not being compatible with the problem), but I'm not sure why it's happening in this example. Does this example work when running it from the normal SimTK OpenSim download?

Best,
-Nick

[Riley Edmonds]

Hi Nick,

Thanks for your input. I have not tried it any other way besides via the docker container using Moco.

Cheers,

Riley