python3 -m fmpy simulate --output-file IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic_res.csv --start-time 0 --stop-time 1000 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.4 IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic.fmu LOG_ASSERT | debug | /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic/IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic.fmutmp/sources/IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic_functions.c:2634: Invalid root: (-nan)^(2) LOG_ASSERT | debug | /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic/IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic.fmutmp/sources/IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic_functions.c:2634: Invalid root: (-nan)^(2) LOG_ASSERT | debug | /var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/IBPSA_latest_IBPSA.Fluid.HeatPumps.Validation.ScrollWaterToWater_Dynamic/IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic.fmutmp/sources/IBPSA_latest_IBPSA_Fluid_HeatPumps_Validation_ScrollWaterToWater_Dynamic_functions.c:2634: Invalid root: (-nan)^(2) LOG_ASSERT | debug | Solving non-linear system 600 failed at time=500.000000666667. | | | | For more information please use -lv LOG_NLS. Exception ignored on calling ctypes callback function: > 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). 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 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 -8) in module CVODE, function CVode: At t = 500, the right-hand side routine failed in an unrecoverable manner.