Environment - simulationEnvironment: startTime=0 stopTime=1200 tolerance=1e-06 numberOfIntervals=500 stepSize=2.4 Regular simulation: ./IDEAS_dev_IDEAS.Fluid.Storage.Examples.StratifiedEnhancedInternalHex -abortSlowSimulation -alarm=480 -lv LOG_STATS LOG_STDOUT | warning | Internal Numerical Jacobians without coloring are currently not supported by IDA with KLU. Colored numerical Jacobian will be used. LOG_SUCCESS | info | The initialization finished successfully with 3 homotopy steps. LOG_ASSERT | debug | IDEAS_dev_IDEAS.Fluid.Storage.Examples.StratifiedEnhancedInternalHex_functions.c:2842: Invalid root: (-6.74351e-05)^(0.5625) LOG_ASSERT | debug | IDEAS_dev_IDEAS.Fluid.Storage.Examples.StratifiedEnhancedInternalHex_functions.c:2842: Invalid root: (-6.74351e-05)^(0.5625) LOG_ASSERT | debug | ##IDA## In function IDAGetNumNonlinSolvIters: The user-provided residual function failed in an unrecoverable manner.