OpenModelica cpp from 2026-07-20 10:42:20 to 2026-07-20 16:52:32

Summary

OMC Commits2
Libraries Changed1
Number of Improvements9
Number of Regressions8
Number of Performance Improvements10
Number of Performance Regressions2

OpenModelica Changes

CommitDateAuthorSummary
41b6f7a5f52026-07-20 11:41:34 +0200Martin SjölundExport MultiBody 3D visualization in FMUs (#16087)
099e898d2b2026-07-20 11:08:36 +0200kabdelhak[NB] Simplify complex when-equation conditions into discrete auxiliary variables (#16090)

OpenModelicaLibraryTesting Changes

CommitDateAuthorSummary
6697fc02026-07-06 18:25:17 +0200linuslangenkamp[GBODE] set Radau IIA 3-stage, remove embedded error estimate (#288)
d357aff2026-06-12 13:26:07 +0200AndreasFix OMSimulator submodule update when directory layout changes (#287)

Library Changes

LibraryChange
Buildings_latestFrom version 14.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/36854481a51c26c04c6333ab07d75880d24fa097.zip) to 14.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/6373efe401ef725de5c50effae40e5efd38de7fd.zip)

Models Affected

Buildings_12Buildings.ThermalZones.EnergyPlus_24_2_0.Examples.SmallOffice.ASHRAE2006Summer (sim)Templates performance 16.81 → 8.31
Buildings_latestBuildings.Airflow.Multizone.Examples.TrickleVent (sim)Verify → Simulate
Buildings_latestBuildings.DHC.Loads.Combined.Examples.BuildingTimeSeriesWithETSDHWTank (sim)Templates performance 6.32 → 13.51
Buildings_latestBuildings.Examples.Tutorial.SimpleHouse.SimpleHouse6 (sim)Simulate → Verify
Buildings_latestBuildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.EvaporationFlowReversal (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.EvaporationPulse (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.HeatExchangers.Examples.WetCoilCounterFlowPIControlAutoTuning (sim)Simulate → Verify
Buildings_latestBuildings.Fluid.HeatExchangers.Examples.WetCoilCounterFlowPIControlAutoTuningFailure (sim)Simulate → Verify
Buildings_latestBuildings.Fluid.HeatExchangers.Examples.WetCoilDiscretizedMassFlow (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.HeatExchangers.Validation.WetCoilDiscretizedInitialization (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.HeatExchangers.Validation.WetCoilDiscretizedInitializationPerfectGases (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.HydronicConfigurations.ActiveNetworks.Examples.InjectionTwoWayVariable (sim)Compile → Simulate
Buildings_latestBuildings.Fluid.MixingVolumes.Validation.MixingVolume (sim)Simulate → Verify
Buildings_latestBuildings.Fluid.Sources.Examples.TraceSubstancesFlowSource (sim)Simulate → Verify
Buildings_latestBuildings.ThermalZones.EnergyPlus_24_2_0.Examples.SmallOffice.Guideline36Spring (sim)Templates performance 34.09 → 19.34
ModelicaTest_3.2.3ModelicaTest.Blocks.FilterTests.AllOptions (sim)BackEnd performance 10.13 → 5.47
ModelicaTest_trunkModelicaTest.Blocks.FilterTests.AllOptions (sim)Simulate performance 41.31 → 23.72
OpenIPSL_devOpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents (sim)
OpenIPSL_devOpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents3 (sim)
ScalableTestGrids_nooptScalableTestGrids.Models.Type1.Type1_N_8_M_4 (sim)Failed → FrontEnd
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)Templates → Verify
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_40_M_40 (sim)Templates performance 11.75 → 6.71
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_56_M_56 (sim)Verify → Templates
ScalableTestSuiteScalableTestSuite.Electrical.TransmissionLine.ScaledExperiments.TransmissionLineEquations_N_640 (sim)Simulate performance 8.45 → 18.49
ScalableTestSuiteScalableTestSuite.Elementary.SimpleODE.ScaledExperiments.CascadedFirstOrder_N_3200 (sim)Simulate performance 29.05 → 14.99
ScalableTestSuiteScalableTestSuite.Thermal.Advection.ScaledExperiments.AdvectionReaction_N_1600 (sim)Simulate performance 54.85 → 25.60
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_320_M_5 (sim)Verify → Templates
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)Templates → Verify
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_80_M_80 (sim)BackEnd performance 0:03:44 → 0:01:58
ScalableTestSuite_nooptScalableTestSuite.Power.ConceptualPowerSystem.ScaledExperiments.PowerSystemStepLoad_N_64_M_16 (sim)Simulate performance 13.63 → 5.57
ScalableTestSuite_nooptScalableTestSuite.Thermal.Advection.ScaledExperiments.AdvectionReaction_N_1600 (sim)Simulate performance 48.95 → 22.37