python3 -m fmpy simulate  --output-file BuildingSystems_BuildingSystems.Fluid.BaseClasses.FlowModels.Validation.BasicFlowFunction_m_flow_DerivativeCheck_res.csv --start-time -2 --stop-time 2 --timeout 50 --relative-tolerance 1e-08 --interface-type ModelExchange --solver CVode --output-interval 0.0016 BuildingSystems_BuildingSystems_Fluid_BaseClasses_FlowModels_Validation_BasicFlowFunction_m_flow_DerivativeCheck.fmu
LOG_ASSERT        | error   | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/Fluid/BaseClasses/FlowModels/Validation/BasicFlowFunction_m_flow_DerivativeCheck.mo:25:3-25:54:writable]
|                 | |       | The following assertion has been violated at time -1.998400
|                 | |       | ((abs(err) < 0.001)) --> "Error in implementation."
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/__main__.py", line 4, in <module>
    main()
  File "/usr/local/lib/python3.10/dist-packages/fmpy/command_line.py", line 167, in main
    result = simulate_fmu(args.fmu_filename,
  File "/usr/local/lib/python3.10/dist-packages/fmpy/simulation.py", line 759, in simulate_fmu
    result = simulateME(model_description, fmu, start_time, stop_time, solver, step_size, relative_tolerance, start_values, apply_default_start_values, input, output, output_interval, record_events, timeout, step_finished, validate, set_stop_time)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/simulation.py", line 1076, in simulateME
    step_event, _ = fmu.completedIntegratorStep()
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 491, in completedIntegratorStep
    self.fmi2CompletedIntegratorStep(self.component, noSetFMUStatePriorToCurrentPoint, byref(enterEventMode), byref(terminateSimulation))
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 215, in w
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi2CompletedIntegratorStep failed with status 3 (error).