Environment - simulationEnvironment: startTime=0 stopTime=3600 tolerance=1e-06 numberOfIntervals=2500 stepSize=1.44 Regular simulation: ./AixLib_latest_AixLib.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedAirPerfectGas -abortSlowSimulation -alarm=480 -s gbode -lv LOG_STATS LOG_STDOUT | warning | Numerical Jacobians without coloring are currently not supported by GBODE. Colored numerical Jacobian will be used. LOG_SUCCESS | info | The initialization finished successfully with 3 homotopy steps. LOG_STDOUT | info | Chattering detected around time 431.083590171..431.410109196 (100 state events in a row with a total time delta less than the step size 0.72). This can be a performance bottleneck. Use -lv LOG_EVENTS for more information. The zero-crossing was: vol1.ports[1].m_flow >= 0.0 LOG_ASSERT | debug | Aborting simulation due to chattering being detected and the simulation flags requesting we do not continue further.