Environment - simulationEnvironment: startTime=0 stopTime=1000 tolerance=1e-06 numberOfIntervals=2500 stepSize=0.4 Regular simulation: ./BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.FlowSystem.Simplified3 -abortSlowSimulation -alarm=480 -lv LOG_STATS LOG_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. LOG_STDOUT | warning | Error solving linear system of equations (no. 10707) at time 0.000000. LOG_STDOUT | warning | Solving linear system 10707 fails at time 0. For more information use -lv LOG_LS. LOG_ASSERT | debug | Solving linear system 10707 failed at time=0. | | | | For more information please use -lv LOG_LS. LOG_ASSERT | info | simulation terminated by an assertion at initialization