Probably you are not setting the external force correctly or the motion is problematic. Can you load the motion? Also look at the message to see if everything is ok with the ID tool. Did you tried the OpenSim examples to see how they setup the ID tool, maybe you are missing something. Yes, I've tri...

It seems that in the region of ~2.6 to ~3.24 you are computing very large moments. It is possible that in the rest you are computing normal values. This can be caused by some discontinuity in your external forces or the kinematics (from Inverse Kinematics). Note that ID uses higher order derivative...

Hi there, The results of joint moments I got from Inverse Dynamics are very weird. The patterns of joint moments in knee and ankle are the same, which should not happen. I have checked the joint angle results and external loads file, and set the Inverse Dynamics tool as in manual. Is there any facto...

Is this error caused by the .trc file? And what should I do to fix it? The .trc file is probably not correctly formated. Please check if the header is correctly specifying the number of markers. Thanks for your reply. I've checked the header. I'm sure it specifies the number of markers correctly. T...

Hi there, When doing IK, I have encountered a problem showing bellow. InverseKinematicsTool Failed: SimTK Exception thrown at AssemblyCondition_Markers.h:390: Error detected by Simbody method Markers::moveAllObservations(): Number of observations provided (49) differs from the number of observations...

mitkof6 wrote:Can you report the err.log and out.log located in the OpenSim installation folder?

out.log can be found attached, but there's no contenr in the err.log.

Hi, Everttime I try to do measurement in Scale Model Tool, the software would stop running suddnely and shows a window says 'Opensim64 has stopped working'. What should I do to solve this problem? Unless I cannot continue my project. The sceenshot can be found attached. Looking forward your reply. R...

Hi, I'm trying to use OpenSim to calculate the joint moments. After calculation, the results of moments are not similar as predicted. It should be caused by different reference points in two softwares. So what is the reference point used in OpenSim inverse dynamics calculation? Any suggestions would...

Hi, The grf must be transformed from the lab's reference frame to the model reference frame. The forces are expressed typically in the ground frame, and are applied at a specific point on a body. I would suggest you to use the existing tools that generate the appropriate OpenSim files from Vicon. h...

I need to input the external load file from Vicon System, but the result went bad. It might cause by the external load file. I have checked the example external load file of model gait2354, the position of external load might not be in the same coordinate system as the model. I'm wondering that wher...