python3 -m fmpy simulate  --output-file Buildings_9_Buildings.Air.Systems.SingleZone.VAV.Examples.ChillerDXHeatingEconomizer_res.csv --start-time 0 --stop-time 504800 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 3605.71 Buildings_9_Buildings_Air_Systems_SingleZone_VAV_Examples_ChillerDXHeatingEconomizer.fmu
LOG_STDOUT        | info    | Using sparse solver for linear system 10,
|                 | |       | because density of 0.160 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 22,
|                 | |       | because density of 0.160 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>'.