python3 -m fmpy simulate  --output-file Buildings_9_Buildings.Airflow.Multizone.Examples.CO2TransportStep_res.csv --start-time 0 --stop-time 86400 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 34.56 Buildings_9_Buildings_Airflow_Multizone_Examples_CO2TransportStep.fmu
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/Fluid/Sensors/BaseClasses/PartialAbsoluteSensor.mo:28:3-33:32:writable]
|                 | |       | The following assertion has been violated during initialization at time 0.000000
|                 | |       | ((not CO2SenTop.warnAboutOnePortConnection)) --> "Sensor CO2TransportStep.CO2SenTop can lead to numerical problems if connected to a scalar fluid port.
|                 | |       |   Only connect it to a vectorized fluid port, such as used in 'Buildings.Fluid.MixingVolumes`.
|                 | |       |   See Buildings.Fluid.Sensors.UsersGuide for more information.
|                 | |       |   To disable this warning, set 'warnAboutOnePortConnection = false' in CO2TransportStep.CO2SenTop."
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/Fluid/Sensors/BaseClasses/PartialAbsoluteSensor.mo:28:3-33:32:writable]
|                 | |       | The following assertion has been violated during initialization at time 0.000000
|                 | |       | ((not CO2SenWes.warnAboutOnePortConnection)) --> "Sensor CO2TransportStep.CO2SenWes can lead to numerical problems if connected to a scalar fluid port.
|                 | |       |   Only connect it to a vectorized fluid port, such as used in 'Buildings.Fluid.MixingVolumes`.
|                 | |       |   See Buildings.Fluid.Sensors.UsersGuide for more information.
|                 | |       |   To disable this warning, set 'warnAboutOnePortConnection = false' in CO2TransportStep.CO2SenWes."
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/Fluid/Sensors/BaseClasses/PartialAbsoluteSensor.mo:28:3-33:32:writable]
|                 | |       | The following assertion has been violated during initialization at time 0.000000
|                 | |       | ((not CO2SenEas.warnAboutOnePortConnection)) --> "Sensor CO2TransportStep.CO2SenEas can lead to numerical problems if connected to a scalar fluid port.
|                 | |       |   Only connect it to a vectorized fluid port, such as used in 'Buildings.Fluid.MixingVolumes`.
|                 | |       |   See Buildings.Fluid.Sensors.UsersGuide for more information.
|                 | |       |   To disable this warning, set 'warnAboutOnePortConnection = false' in CO2TransportStep.CO2SenEas."
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 1059, in simulateME
    state_event, roots_found, time = solver.step(time, t_next)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/sundials/__init__.py", line 178, in step
    raise RuntimeError("CVode error (code %s) in module %s, function %s: %s" % self.error_info)
RuntimeError: CVode error (code -1) in module CVODE, function CVode: At t = 3.46375, mxstep steps taken before reaching tout.