Hi Emil, Thanks for your reply. I am working on Opensim 3.2. But I am using a model that has the Thelen2004 muscle model implemented with. Maybe you are using the newer Millard2012 model for muscle I guess ? Could you send me a copy of your model so that I can look at the values you have for the mus...

Hello everybody,

I have found on a recent paper that the Flen (max normalized lengthening force) for young(~20 y.o.) people should be around 1.4 instead of the regular Thelen2003 value which is 1.8 and is more for older people (>40 y.o.). What do you think about that ?

Cheers

Hello everybody, So I would like to thank James for his help. We discovered that the point of application of the external forces (COP) really need to be precise in order for SO to work. I had made a mistake in changing the coordinates from my lab system to the Opensim environment and so the COP were...

Hello James,

Yes I am quite sure that all my DOF are covered by residual actuators.

Hello Brandon, So I looked for them but I don't have any Coordinate limit forces in my model. I have all the residual actuators with the optimal force of 1 and the control values -inf or inf and I tried to increase the max isometric force by three times, however I still get the same error messages a...

Hello Brandon, thanks a lot for your answer. I cannot find the coordinate limit force you are talking about in my model. Could please show me how it looks like so that I know where to look ? Otherwise for the actuators I have already all the control values to -inf or inf and optimal forces are mostl...

Hello everybody, I am currently working on a simulation project of the tennis serve and I am trying to use the static optimization tool in order to get muscle forces in the lower limbs. However in each trial, I have this warning message and I would like to find a solution about it. I tried to increa...