Environment - simulationEnvironment: startTime=0 stopTime=504800 tolerance=1e-06 numberOfIntervals=140 stepSize=3605.71 Regular simulation: ./Buildings_9_Buildings.Air.Systems.SingleZone.VAV.Examples.ChillerDXHeatingEconomizer -abortSlowSimulation -alarm=480 -s cvode -emit_protected -lv LOG_STATS LOG_STDOUT | info | Using sparse solver for linear system 10, | | | | because density of 0.160 remains under threshold of 0.200. LOG_STDOUT | info | Using sparse solver for linear system 22, | | | | because density of 0.160 remains under threshold of 0.200. LOG_STDOUT | info | The maximum density for using sparse solvers can be specified | | | | using the runtime flag '<-lssMaxDensity=value>'. LOG_SUCCESS | info | The initialization finished successfully with 3 homotopy steps. LOG_STDOUT | info | Chattering detected around time 4210.04135332..5065.7863572 (100 state events in a row with a total time delta less than the step size 1802.85714286). This can be a performance bottleneck. Use -lv LOG_EVENTS for more information. The zero-crossing was: not pre(con.hysHea.y) and hvac.uHea > 0.05 or pre(con.hysHea.y) and hvac.uHea >= 0.01 LOG_ASSERT | debug | Aborting simulation due to chattering being detected and the simulation flags requesting we do not continue further.