python3 -m fmpy simulate  --output-file ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.IdealGases.SimpleNaturalGasFixedComposition_res.csv --start-time 0 --stop-time 1.01 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.000404 ModelicaTest_trunk_ModelicaTest_Media_TestsWithFluid_MediaTestModels_IdealGases_SimpleNaturalGasFixedComposition.fmu