Environment - simulationEnvironment: startTime=0 stopTime=604800 tolerance=1e-06 numberOfIntervals=2500 stepSize=241.92 Regular simulation: ./Buildings_3.0.0_Buildings.Obsolete.Air.Systems.SingleZone.VAV.Examples.OptimalStart.Guideline36Winter -abortSlowSimulation -alarm=480 -lv LOG_STATS stdout | warning | The default linear solver fails, the fallback solver with total pivoting is started at time 0.000000. That might raise performance issues, for more information use -lv LOG_LS. assert | debug | division leads to inf or nan at time 0, (a=-inf) / (b=2e-07), where divisor b is: max(-zonAHUG36Con.hvac.totalRes.m_flow, 1e-07) + max(zonAHUG36Con.hvac.ideEco.preMasFlo.m_flow, 1e-07) assert | error | Failed to solve the initialization problem with global homotopy with equidistant step size. assert | debug | Unable to solve initialization problem. assert | info | simulation terminated by an assertion at initialization