python3 -m fmpy simulate  --output-file Buildings_9_Buildings.Fluid.HeatExchangers.BaseClasses.Examples.RayleighNumber_res.csv --start-time 0 --stop-time 50 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.02 Buildings_9_Buildings_Fluid_HeatExchangers_BaseClasses_Examples_RayleighNumber.fmu