Environment - simulationEnvironment: startTime=0 stopTime=86400 tolerance=1e-06 numberOfIntervals=2500 stepSize=34.56 Regular simulation: ./BuildingSystems_BuildingSystems.Buildings.Zones.Examples.SingleZoneThermal3x3x3WithOpenings -abortSlowSimulation -alarm=240 -lv LOG_STATS LOG_STDOUT | info | ... loading "tab1" from "/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/Climate/weather/Germany_Berlin.txt" LOG_SUCCESS | info | The initialization finished successfully with 3 homotopy steps. LOG_STDOUT | info | Chattering detected around time 1.05879265072e-15..8.6959679192e-09 (100 state events in a row with a total time delta less than the step size 34.56). This can be a performance bottleneck. Use -lv LOG_EVENTS for more information. The zero-crossing was: sign(zone.airvolume.flowConX122.Fp) == sign(zone.airvolume.flowConX122.Fm_tmp) LOG_ASSERT | debug | Aborting simulation due to chattering being detected and the simulation flags requesting we do not continue further.