Environment - simulationEnvironment: startTime=0 stopTime=86400 tolerance=1e-06 numberOfIntervals=2500 stepSize=34.56 Regular simulation: ./BuildingSystems_BuildingSystems.Buildings.Zones.Examples.SingleZoneThermal3x3x3 -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 without homotopy method. LOG_STDOUT | info | Chattering detected around time 7.37774304896e-16..14.0715097813 (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.flowConY212.Fp) == sign(zone.airvolume.flowConY212.Fm_tmp) LOG_ASSERT | debug | Aborting simulation due to chattering being detected and the simulation flags requesting we do not continue further.