Alternatively since I have the velocity and acceleration at the joints recorded in my experimental data, would adding it to the .mot file solve the problem?

In the model I included the mass for the Humerus, Shadow Arm and Shadow hand as I wanted to concentrate the mass on those bodies.

Do I need to have a mass value for every body that is part of the motion (at the elbow and shoulder)?

I have done so.

Also when I run it, the model does not follow the input motion and direction while the Inverse Dynamics followed it. The muscles also dont stay connected to the bones but seem to extend well beyond the body of the model.

Hi Ayman. I am running the modified model that you had helped me create previously, in version 2.4. It works and generates an ID output. However when I run Static Optimization on it, at everystep I get the message constraint violation = -1 #ND What does the error mean? I understand that large constr...

Opensim 2.3.1 startups up sometimes and at othertimes gives the error I mentioned previously.

<r>I installed Opensim 2.3.1 but during startup of the program I get this error:<br/> <br/> java.lang.AssertionError: WindowsAPI is required to be called from AWT thread only, see <URL url="http://www.netbeans.org/download/dev/javadoc/OpenAPIs/org/openide/doc-files/threading.html"><LINK_TEXT text="h...

I have attached the new file with the bug report.

I am currently replacing all the fixed joints in the model with weldjoints. Will that solve the problem?

I didnt understand completely what you meant about the joint's deviation coordinate.