Environment - simulationEnvironment: startTime=0 stopTime=180 tolerance=1e-06 numberOfIntervals=2500 stepSize=0.072 Regular simulation: ./BuildingSystems_BuildingSystems.Buildings.Airvolumes.Examples.AirElementsThermal3x3x1WithOpenings -abortSlowSimulation -alarm=240 -lv LOG_STATS LOG_SUCCESS | info | The initialization finished successfully without homotopy method. LOG_STDOUT | info | Chattering detected around time 0.00000000000000000000028081620586913903..0.021311728190751895 (100 state events in a row with a total time delta less than the step size 0.072). This can be a performance bottleneck. Use -lv LOG_EVENTS for more information. The zero-crossing was: sign(flowConnectionY_321_331.Fp) == sign(flowConnectionY_321_331.Fm_tmp) LOG_ASSERT | debug | Aborting simulation due to chattering being detected and the simulation flags requesting we do not continue further.