python3 -m fmpy simulate  --output-file Buildings_8_Buildings.Fluid.Sensors.Examples.TraceSubstances_res.csv --start-time 0 --stop-time 7200 --timeout 50 --relative-tolerance 1e-06 Buildings_8_Buildings_Fluid_Sensors_Examples_TraceSubstances.fmu
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/Fluid/Interfaces/PartialTwoPortInterface.mo:21:3-22:81:writable]
|                 | |       | The following assertion has been violated at time 0.000000
|                 | |       | ((res.m_flow >= -1e5 and res.m_flow <= 0.0)) --> "Variable violating min/max constraint: -1e5 <= res.m_flow <= 0.0, has value: 7.27596e-15"