Environment - simulationEnvironment:
startTime=6.3936e+06
stopTime=7.1712e+06
tolerance=1e-06
numberOfIntervals=2500
stepSize=311.04
Regular simulation: ./Buildings_9_Buildings.Air.Systems.SingleZone.VAV.Examples.OptimalStart.ConventionalSpring  -abortSlowSimulation -alarm=480  -emit_protected -lv LOG_STATS
LOG_STDOUT        | warning | The default linear solver fails, the fallback solver with total pivoting is started at time 6393600.000000. That might raise performance issues, for more information use -lv LOG_LS.
LOG_ASSERT        | debug   | division by zero at time 6393600, (a=3.874900467232077e-06) / (b=0), where divisor b expression is: max(-zonAHUCon.hvac.out.ports[3].m_flow, 1e-07) - zonAHUCon.sinZonFlo.ports[2].m_flow
LOG_ASSERT        | error   | Failed to solve the initialization problem with global homotopy with equidistant step size.
LOG_ASSERT        | debug   | Unable to solve initialization problem.
LOG_ASSERT        | info    | simulation terminated by an assertion at initialization