Error when loading 3D Gait Model With Simple Arms

[Jorge Elvira]

Hi,

I'm new to OpenSim. I just downloaded OpenSim 4.2 in order to model the human gait in my BSc Thesis.

I downloaded the "Simulation of Human Running" package found in "Muscle-actuated Simulation of Human Running". Whenever I try to open the model, the following error message appears:

Code: Select all

Updating Model file from 20001 to latest format...
Model name '3D Gait Model with Simple Arms' contains whitespace.
It was renamed to '3DGaitModelwithSimpleArms'.
Loaded model 3DGaitModelwithSimpleArms from file /Users/jorgeelvira/Desktop/pisada_opensim/01SimulationofHumanRunning-latest/RunningSimulation_simTK/FullBodyModel_Hamner2010_v2_0.osim
Visualizer couldn't open hat_ribs_scap.vtp because: SimTK Exception thrown at PolygonalMesh.cpp:411:
  Error detected by Simbody method PolygonalMesh::loadVtpFile(): Attempt to load a VTK PolyData (.vtp) file from file name '/Users/jorgeelvira/Desktop/pisada_opensim/01SimulationofHumanRunning-latest/RunningSimulation_simTK/hat_ribs_scap.vtp' failed with message:
  SimTK Exception thrown at PolygonalMesh.cpp:340:
  Error detected by Simbody method PolygonalMesh::loadVtpFile(): Only format="ascii" is supported for .vtp file DataArray elements, got format="appended" for Points DataArray.
  (Required condition 'pointData.getRequiredAttributeValue("format") == "ascii"' was not met.)

  (Required condition '!"failed"' was not met.)

I don't know what's the issue here, or if I'm doing something wrong.
Any kind of assistance would be greatly appreciated.

[Ayman Habib]

Hi Jorge,

There's nothing wrong here other than the fact that the model(s) you're using were made using version 3.3 or earlier and you're trying to open them in version 4.0+. The models work for all practical purposes but some mesh files fail to open for the reasons described in 4.0 release notes
https://simtk-confluence.stanford.edu/d ... penSim+4.0

Typically model authors or research groups that plan to continue using a model would upgrade it to work seamlessly in the latest format. We can help/advise in this regard, but feel free to reach the model/project authors to upgrade and help the user community.

Hope this helps,
-Ayman

[Jorge Elvira]

Hi again!

I downloaded OpenSim 3.3 and now it works just fine! I wish I could use 4.2 instead as it looks amazing, but I'll have to stick to 3.3 (at least for now). I wanted to thank you all for the amazing job you have done with the software, I admire how much potential it has and for sure will help to put forward a lot of research. I'll try to spread the word about it.

Part of my BSc Thesis is developing a midsole for a running shoe or other sports applications, and I was wondering if I could get some pressure distribution data from the simulation, or something more detailed than the ground reaction forces that I can get for example in the Gait2354 model.

Thank you very much!
Kind regards,
Jorge