python3 -m fmpy simulate  --output-file Modelica_3.2.3_Modelica.Mechanics.MultiBody.Examples.Loops.EngineV6_res.csv --start-time 0 --stop-time 1.01 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.000404 Modelica_3_2_3_Modelica_Mechanics_MultiBody_Examples_Loops_EngineV6.fmu
LOG_STDOUT        | info    | Using sparse solver for linear system 6,
|                 | |       | because density of 0.004 remains under threshold of 0.200.
LOG_STDOUT        | info    | The simulation runtime does not have access to sparse solvers. Defaulting to a dense linear system solver instead.
LOG_STDOUT        | info    | Using sparse solver for linear system 13,
|                 | |       | because density of 0.005 remains under threshold of 0.200.
LOG_STDOUT        | info    | The simulation runtime does not have access to sparse solvers. Defaulting to a dense linear system solver instead.
LOG_STDOUT        | info    | The maximum density for using sparse solvers can be specified
|                 | |       | using the runtime flag '<-lssMaxDensity=value>'.