python3 -m fmpy simulate --output-file IDEAS_dev_IDEAS.Fluid.HeatPumps.Validation.ScrollWaterToWater_VariableSpeed_res.csv --start-time 0 --stop-time 1000 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.4 IDEAS_dev_IDEAS_Fluid_HeatPumps_Validation_ScrollWaterToWater_VariableSpeed.fmu LOG_NLS | error | residualFunc297: Iteration variable xloc[0] is nan. LOG_ASSERT | debug | residualFunc297 failed at time=108.00000031029. | | | | For more information please use -lv LOG_NLS. LOG_STDOUT | warning | While solving non-linear system an assertion failed at time 108. | | | | | 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