python3 -m fmpy simulate  --output-file MEV_MEV.Simulations.LinearControl.Scenario6_res.csv --start-time 0 --stop-time 15 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.005 MEV_MEV_Simulations_LinearControl_Scenario6.fmu
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[4].valve_out.air.rho) was -7.59355 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[4].valve_out.air.rho) was -7.53502 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[4].valve_out.air.rho) was -7.00829 should be >= 0
LOG_ASSERT        | debug   | Solving non-linear system 1817 failed at time=0.860869567026661.
|                 | |       | For more information please use -lv LOG_NLS.
Exception ignored on calling ctypes callback function: <bound method CVodeSolver.f of <fmpy.sundials.CVodeSolver object at 0x7f3e50a32da0>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/fmpy/sundials/__init__.py", line 141, in f
    self.get_dx(NV_DATA_S(ydot), self.nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 505, in getDerivatives
    return self.fmi2GetDerivatives(self.component, dx, nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 215, in w
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi2GetDerivatives failed with status 3 (error).
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[4].valve_out.air.rho) was -0.554577 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[4].valve_out.air.rho) was -0.542977 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[4].valve_out.air.rho) was -0.438582 should be >= 0
LOG_ASSERT        | debug   | Solving non-linear system 1817 failed at time=0.860869565579245.
|                 | |       | For more information please use -lv LOG_NLS.
Exception ignored on calling ctypes callback function: <bound method CVodeSolver.f of <fmpy.sundials.CVodeSolver object at 0x7f3e50a32da0>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/fmpy/sundials/__init__.py", line 141, in f
    self.get_dx(NV_DATA_S(ydot), self.nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 505, in getDerivatives
    return self.fmi2GetDerivatives(self.component, dx, nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 215, in w
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi2GetDerivatives failed with status 3 (error).
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -2.94547e+06 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -2.94547e+06 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -2.94547e+06 should be >= 0
LOG_ASSERT        | debug   | Solving non-linear system 1577 failed at time=1.41428571578381.
|                 | |       | For more information please use -lv LOG_NLS.
Exception ignored on calling ctypes callback function: <bound method CVodeSolver.f of <fmpy.sundials.CVodeSolver object at 0x7f3e50a32da0>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/fmpy/sundials/__init__.py", line 141, in f
    self.get_dx(NV_DATA_S(ydot), self.nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 505, in getDerivatives
    return self.fmi2GetDerivatives(self.component, dx, nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 215, in w
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi2GetDerivatives failed with status 3 (error).
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -5214.2 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -5214.2 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -5214.2 should be >= 0
LOG_ASSERT        | debug   | Solving non-linear system 1577 failed at time=1.41428571458535.
|                 | |       | For more information please use -lv LOG_NLS.
Exception ignored on calling ctypes callback function: <bound method CVodeSolver.f of <fmpy.sundials.CVodeSolver object at 0x7f3e50a32da0>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/fmpy/sundials/__init__.py", line 141, in f
    self.get_dx(NV_DATA_S(ydot), self.nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 505, in getDerivatives
    return self.fmi2GetDerivatives(self.component, dx, nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 215, in w
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi2GetDerivatives failed with status 3 (error).
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -11.8472 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -11.8472 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[10].valve_in.air.rho) was -11.8472 should be >= 0
LOG_ASSERT        | debug   | Solving non-linear system 1577 failed at time=1.41428571434565.
|                 | |       | For more information please use -lv LOG_NLS.
Exception ignored on calling ctypes callback function: <bound method CVodeSolver.f of <fmpy.sundials.CVodeSolver object at 0x7f3e50a32da0>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/dist-packages/fmpy/sundials/__init__.py", line 141, in f
    self.get_dx(NV_DATA_S(ydot), self.nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 505, in getDerivatives
    return self.fmi2GetDerivatives(self.component, dx, nx)
  File "/usr/local/lib/python3.10/dist-packages/fmpy/fmi2.py", line 215, in w
    raise FMICallException(function=fname, status=res)
fmpy.fmi1.FMICallException: fmi2GetDerivatives failed with status 3 (error).
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -22189.6 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -14533.8 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -9519.2 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -6234.66 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -4083.29 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -2674.14 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -1751.15 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -1146.59 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -750.605 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -491.234 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -321.346 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -210.069 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -137.183 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -89.4423 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -58.1722 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -37.6904 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -24.2747 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -15.4875 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -9.73187 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -5.96193 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -3.49261 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -1.87521 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -0.815817 should be >= 0
LOG_ASSERT        | debug   | Model error: Argument of sqrt(patients[2].valve_in.air.rho) was -22212.7 should be >= 0
LOG_STDOUT        | warning | While solving non-linear system an assertion failed at time 2.06897.
|                 | |       | | The non-linear solver tries to solve the problem that could take some time.
|                 | |       | | It could help to provide better start-values for the iteration variables.
|                 | |       | | For more information simulate with -lv LOG_NLS_V
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 = 2.14116, mxstep steps taken before reaching tout.