Failed to load .dll library

[Michael Woodward]

Hi all

I'm trying to run a user plugin (MuscleForceDirection) for OpenSim3.3 through the MATLAB API. The plugin loads and runs fine in the GUI but when I try to run it through MATLAB I get the following error:

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Failed to load library MuscleForceDirection.dll 
ERROR- library MuscleForceDirection.dll could not be loaded. 

Is there an installation step I'm missing for MATLAB that's specific to the plugin (I've configured MATLAB for OpenSim and added the plugin folder to the MATLAB path)? I've seen a fair few suggestions on the forum to run 'Model.LoadOpenSimLibrary()' but this seems to have no effect.

Cheers

Michael

[Christopher Dembia]

Leave off the ".dll" argument when you invoke `Model.LoadOpenSimLibrary`.

[Michael Woodward]

Hi Christopher

I've tried this, but unfortunately the result is the same. Do you have any other ideas?

[Christopher Dembia]

Can you share snippets of your code causing the error?

[Michael Woodward]

Yeah sure, it's essentially just this:

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plugin2load = 'MuscleForceDirection.dll';

Model.LoadOpenSimLibrary('C:\OpenSim 3.3\plugins\MuscleForceDirection');

dos(['analyze -S ',LoAxml,' -L ', plugin2load], '-echo');

With 'LoAxml' being the path to the settings xml for the analysis.

[Thomas Uchida]

You aren't actually using the OpenSim API through MATLAB when you use the dos() function. I think you want to do something like this:

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myAnalysis = AnalyzeTool(LoAxml);
myAnalysis.run();

See the "setupAndRunAnalyzeBatchExample.m" example on the "Scripting with Matlab" page in the Confluence documentation (https://simtk-confluence.stanford.edu/d ... ith+Matlab).