Environment - simulationEnvironment: startTime=0 stopTime=180 tolerance=1e-06 numberOfIntervals=2500 stepSize=0.072 Regular simulation (gbode: the generic bi-rate ODE solver, with the radauIIA3 method): ./BuildingSystems_BuildingSystems.Buildings.Airvolumes.Examples.AirElementsThermal3x3x1WithOpenings -abortSlowSimulation -alarm=480 -lv LOG_STATS -s gbode -gbm=radauIIA3 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 without homotopy method. LOG_STDOUT | info | Chattering detected around time 1.30316733811e-16..0.0214964298011 (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(flowConnectionX_111_112.Fp) == sign(flowConnectionX_111_112.Fm_tmp) LOG_ASSERT | debug | Aborting simulation due to chattering being detected and the simulation flags requesting we do not continue further.