Regular simulation: ./Buildings_5.0.1_Buildings.Electrical.AC.ThreePhasesUnbalanced.Validation.IEEETests.Test4NodesFeeder.UnbalancedStepDown.YD -abortSlowSimulation -alarm=480   
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   | ##IDA## discrete update failed flag -6!
assert            | info    | simulation terminated by an assertion at initialization