Kang,

If there are no ground reaction forces applied at your start time your model will either fall through the ground or start floating away. So the 1st thing that I would check is that you have GRF. Let me know if that doesn't help, I have a few more ideas.

Becca

Kang,

I am using 2.02, but I have too many forceplate to not use 2+.

Becca

Kang,

The RRA for my data, did reduce the residuals quite a bit. My residuals were not terribly high to begin with though. I also passed my data through RRA more than once.

Becca

I am using CMC for stair climbing. Do you have any specific questions I can answer?

All that looks okay. i read in someone elses post to increase the excitations in the activations file, but I don't know which ones to increase and also how do I lock joints in my model?
B

<t>Okay now my problem with RRA is completely different. And I read previous posts of RRA trouble shooting which is why my COM was changed, but with every frame my model sinks lower and lower on the window.<br/> Anyone have any thoughts as to why my simulation is doing that?<br/> Thanks.<br/> Becca<...

Yi,

Genius! I restarted OpenSim and there was no more error message when I tried to run RRA.
Thanks!

Becca

<t>This is for the stair climbing that you helped out with the ID for (Rob is my adviser). I took the RRA example xmls and changed the external forces and the COM of the pelvis (and of course my file names) only. When I press run it gives me that error. From what I can tell the simulation has just b...

About RRA...
I have nearly the example xml files... with changed COM for pelvis and 3 external forces... yet for some reason it won't run... error is as follows:

ArrayPtrs.get(aName): No object with name hip_flexion_r

Any thoughts as to why this is?

<t>Andy,<br/> <br/> I am using two XML's to run the ID (one for setup and one for the forces). And by hardcoded I mean that within the forces XML I point to the exact directory not just the local file extension where my MOT is...<br/> <br/> something like:<br/> <datafile>E:\Becca\Session 1\Becca Sta...