python3 -m fmpy simulate  --output-file ThermofluidStream_ThermofluidStream.Boundaries.Tests.VolumesDirectCoupling_res.csv --start-time 0 --stop-time 0.05 --timeout 1200 --relative-tolerance 1e-07 --interface-type ModelExchange --solver CVode --output-interval 5e-06 ThermofluidStream_ThermofluidStream_Boundaries_Tests_VolumesDirectCoupling.fmu
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:115:3-115:112:writable]
|                 | |       | The following assertion has been violated at time 0.000010
|                 | |       | ((sink4.inlet.m_flow > heatportVolume2.m_flow_assert)) --> "Positive mass flow rate at Volume outlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:114:3-114:109:writable]
|                 | |       | The following assertion has been violated at time 0.000010
|                 | |       | (((-source.outlet.m_flow) > heatportVolume1.m_flow_assert)) --> "Negative mass flow rate at Volume inlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:114:3-114:109:writable]
|                 | |       | The following assertion has been violated at time 0.000010
|                 | |       | (((-heatportVolume3.m_flow_out) > heatportVolume4.m_flow_assert)) --> "Negative mass flow rate at Volume inlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:115:3-115:112:writable]
|                 | |       | The following assertion has been violated at time 0.000010
|                 | |       | (((-heatportVolume3.m_flow_out) > heatportVolume3.m_flow_assert)) --> "Positive mass flow rate at Volume outlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:114:3-114:109:writable]
|                 | |       | The following assertion has been violated at time 0.000010
|                 | |       | (((-heatportVolume5.m_flow_out) > heatportVolume6.m_flow_assert)) --> "Negative mass flow rate at Volume inlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:115:3-115:112:writable]
|                 | |       | The following assertion has been violated at time 0.000010
|                 | |       | (((-heatportVolume5.m_flow_out) > heatportVolume5.m_flow_assert)) --> "Positive mass flow rate at Volume outlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:114:3-114:109:writable]
|                 | |       | The following assertion has been violated at time 0.000335
|                 | |       | (((-heatportVolume8.m_flow_out) > heatportVolume9.m_flow_assert)) --> "Negative mass flow rate at Volume inlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:115:3-115:112:writable]
|                 | |       | The following assertion has been violated at time 0.000335
|                 | |       | (((-heatportVolume8.m_flow_out) > heatportVolume8.m_flow_assert)) --> "Positive mass flow rate at Volume outlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:115:3-115:112:writable]
|                 | |       | The following assertion has been violated at time 0.000460
|                 | |       | ((sink1.inlet.m_flow > heatportVolume7.m_flow_assert)) --> "Positive mass flow rate at Volume outlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:114:3-114:109:writable]
|                 | |       | The following assertion has been violated at time 0.000460
|                 | |       | (((-source1.outlet.m_flow) > heatportVolume10.m_flow_assert)) --> "Negative mass flow rate at Volume inlet"
LOG_ASSERT        | warning | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermofluidStream 1.1.0-main/Boundaries/Internal/PartialVolume.mo:115:3-115:112:writable]
|                 | |       | The following assertion has been violated at time 0.000460
|                 | |       | ((sink2.inlet.m_flow > heatportVolume11.m_flow_assert)) --> "Positive mass flow rate at Volume outlet"
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 = 0.00160876, mxstep steps taken before reaching tout.