As noted in the other thread ( http://community.wolfram.com/groups/-/m/t/339700?p_p_auth=q7hVqLPX ), if you are using version 3 there is no way to specify or retrieve the name of the result file.

You can continue using the functionality in WSMLink to read data from the simulation result, see WSMSimulationData documentation: http://reference.wolfram.com/system-modeler/WSMLink/ref/WSMSimulationData.html

Not having used pyhonica, I guess you could just continue calling the relevant Mathematica functions to read the results and create a plot (look up WSMSimulationData and/or WSMPlot).

If you want to read the raw data from the result file yourself, that would of course require a quite large amount of work, but the file format is specified in the documentation here: http://reference.wolfram.com/system-modeler/UserGuide/SimulationCenterSimulationResultFiles.html

I'm not sure what your intention or actual steps to get here were, but in general, WSMLink cannot currently be used to export simulation executables or simulation settings files. This functionality is available in Simulation Center. This is documented at the bottom of this page: http://reference.wolfram.com/system-modeler/UserGuide/SimulationCenterImportingAndExporting.html