Joint Load Optimization Plugin

[Karthick Ganesan]

Dear All,
How to install joint load optimization plugin? Please let me know.
Thanks & Regards,
Karthick.

[Thomas Uchida]

The Confluence documentation has a couple pages on plugins:
- "Using Plugins" - https://simtk-confluence.stanford.edu/d ... ng+Plugins
- "Creating Plugins" - https://simtk-confluence.stanford.edu/d ... ng+Plugins

[Karthick Ganesan]

Dear Tom,
Thanks for your reply. I went through the documentation and followed the procedure. But I got errors while building in Visual Studio. I am using opensim 3.3 and Visual studio express 2013 for windows desktop. I could build analysis plugin example without error. A screenshot of the error is attached. What could be the issue. Please let me know.

Thanks & Regards,
Karthick

Error Visual Studio.png (61.64 KiB) Viewed 1408 times

[Thomas Uchida]

Difficult to say exactly without seeing the code. Based on errors 1 and 2, you are trying to modify a value returned by a getXXX() method (you may need to use the updXXX() version of the method instead, depending on what you are trying to do). Not sure about errors 3 and 5; perhaps you're missing #include <OpenSim.h>? Based on the text in the last column, you are building DeMersOptimizationPlugin, which I presume you downloaded from a simtk project. Was that code designed to work with OpenSim 3.3?

[Karthick Ganesan]

Yes. I downloaded the source code from Simtk project page.
https://simtk.org/projects/jointloadopt
I am not sure whether the code was designed to work with opensim 3.3. I could not find this information in the project page. How can I find that information?

[Thomas Uchida]

The citation provided on the simtk project page is for a paper that was published in 2014. OpenSim 3.3 was not released until July 2015 and it's unlikely that the code has been updated.

[Karthick Ganesan]

I could build the source code successfully with opensim 3 and VC10Pro. It is installed in the plugins directory. But I could not load the plugin. It says " unable to load library DeMersOptimizationPlugin. Plugin not loaded". What could be the problem.

[Thomas Uchida]

Could be a compatibility issue: the plugin must be built with the same version of Visual Studio as the OpenSim distribution. Please see the "Creating Plugins" page in the Confluence documentation (https://simtk-confluence.stanford.edu/d ... ng+Plugins).

[Karthick Ganesan]

I built the plugin with compatible version of visual studio and opensim: OpenSim 3.0 VC10P and Visual Studio 2010 Professional.

[Thomas Uchida]

How did you determine that the plugin should be built with OpenSim 3.0? The "Initial release" date on the simtk project page is January 1, 2014, so I would have expected it to use version 3.1.