I'm running a standard CMC analysis, which got stuck at at the beigining without any error. I'm looking for some ideas that I can start with to check my model and setup files. This problem is for Opensim 4.2, and the same setup files worked great for CMC of other subjects.

Hi, I have some problems running RRA. The right ankle twists arbitrarily at the end of gait during its swing phase. I cannot fix it by increasing the weight. Now I'm considering if the problem is due to GRF applied. Since the experiment used several force plate, the former force plates that were pas...

flanker27 wrote: ↑

Tue Dec 31, 2019 11:59 am

I've run into this issue as well and don't really know how to fix it, is there a tutorial for it? Thanks in advance and happy new year!

You should check muscle length of your model.

I'm doing some optimization of walking, and find some muscle fiber velocity -inf.
Is there any way to avoid this?

tkuchida wrote: ↑

Thu Nov 21, 2019 9:55 am

Still not sure what you're trying to do, but there are some methods in OpenSim's Component interface that might be helpful:

Yes, it helps. I solved my problem. Thanks.

It is generally advisable to get the values of state variables through the OpenSim API. For example, you can ask a Muscle for its fiber length using getFiberLength() ( https://simtk.org/api_docs/opensim/api_docs/classOpenSim_1_1Muscle.html#a4510134e2be56db618adb061455143e8 ). It would be helpful to...

I'm confused about the states' order when I use State::getY() or similar methods. I found Y=Q+U+Z, but the states' orders inside Q,U,Z are hard to know. Is there a method to output states' name with the same sequence order of Y? I tried Component::getStateVariableNames. It can output same states as ...

Maybe you haven't provided the include dir when compiling with mex. The compiler must know the location of the OpenSim.h file directory. This is typically provided with the -I argument. https://stackoverflow.com/questions/6767844/asking-mex-to-use-several-directories-for-include-files#6768067 https...

Thanks for your reply. I agree with you, and I checked with VS 15 and 17 that are used by Opensim 4.0, but neither works. I still cannot figure out the problem. But luckily I can use other methods to continue my work.

jimmy wrote: ↑

Sat Nov 09, 2019 6:01 pm

The file contains a character that cannot be represented in the current code page (936).

https://stackoverflow.com/questions/105 ... in-unicode

Thank you! It does help to remove the warning, but the errors still remain.