(cd run_fmpy-fmi3-cs-cvode && python3 -m fmpy simulate --output-file ../ModelicaTest_4.0.0_ModelicaTest.Fluid.TestComponents.Vessels.TestSimpleTank_fmpy-fmi3-cs-cvode_res.csv --output-variables tank.level tank.medium.T timeTable.a timeTable.b timeTable.last timeTable.nextEvent --start-time 0 --stop-time 100 --timeout 240 --relative-tolerance 1e-06 --interface-type CoSimulation --output-interval 0.0199283 ../ModelicaTest_4_0_0_ModelicaTest_Fluid_TestComponents_Vessels_TestSimpleTank_fmpy-fmi3-cs-cvode.fmu)
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.000000
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000000100016e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.000000
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000000100016e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.000000
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000000100016e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.000000
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000000100016e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | info    | Found event, previous asserts are ignored.
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.019928
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000546248174e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.019928
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000546248174e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | info    | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/Fluid/Vessels.mo:104:3-104:127:writable]
|                 | |       | The following assertion has been violated at time 0.019928
|                 | |       | ((tank.level > 0.0), tank.level=-1.000000546248174e-10) --> "Fluid level is too low; the energy balance equation becomes singular when the tank is completely empty."
LOG_ASSERT        | error   | No event found, but assert was triggered. Throwing now!
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/__main__.py", line 4, in <module>
    main()
    ~~~~^^
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/cli.py", line 186, in main
    result = simulate_fmu(args.fmu_filename,
                          validate=args.validate,
    ...<14 lines>...
                          visible=args.visible,
                          fmi_call_logger=fmi_call_logger)
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/simulation.py", line 801, in simulate_fmu
    result = simulateCS(model_description, fmu, start_time, stop_time, relative_tolerance, start_values, apply_default_start_values, input, output, output_interval, timeout, step_finished, set_input_derivatives, use_event_mode, early_return_allowed, validate, initialize, terminate, set_stop_time)
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/simulation.py", line 1350, in simulateCS
    event_encountered, terminate_simulation, early_return, last_successful_time = fmu.doStep(currentCommunicationPoint=time, communicationStepSize=step_size)
                                                                                  ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/fmi3.py", line 1968, in doStep
    self.fmi3DoStep(
    ~~~~~~~~~~~~~~~^
        self.component,
        ^^^^^^^^^^^^^^^
    ...<6 lines>...
        byref(lastSuccessfulTime),
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/fmi3.py", line 1268, in fmi3DoStep
    return self._call(
           ~~~~~~~~~~^
        "fmi3DoStep",
        ^^^^^^^^^^^^^
    ...<7 lines>...
        lastSuccessfulTime,
        ^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/opt/libtest-venv/lib/python3.14/site-packages/fmpy/fmi1.py", line 369, in _call
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi3DoStep failed with status 3 (error).