OpenModelica master from 2026-08-03 13:40:53 to 2026-08-04 04:52:29

Summary

OMC Commits4
Libraries Changed4
Number of Improvements20
Number of Regressions17
Number of Performance Improvements31
Number of Performance Regressions9

OpenModelica Changes

CommitDateAuthorSummary
ebdd3203f22026-08-03 20:23:42 +0200Martin SjölundNumerical Jacobian: nominal step below atol only (#16176)
f3478a7f4a2026-08-03 20:06:38 +0200cbermperi[NB] Implement cyclic alias set resolution using Bareiss elimination (#15796)
3f2692fe7f2026-08-03 17:36:43 +0200Martin Sjölundwasm-jit: the gbode and rungekutta solvers (#16180)
cc716187192026-08-03 16:11:38 +0300Adrian Pop[Backend] Replace variables under record field accesses (DAE.RSUB) (#16178)

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_11From version 11.1.2-maint.11.x (https://github.com/lbl-srg/modelica-buildings/archive/df423074e48835df648a03866d9e703d4569114a.zip) to 11.1.2-maint.11.x (https://github.com/lbl-srg/modelica-buildings/archive/409edb846408a44d6f0b7cb2fa0eef479e3f0076.zip)
Buildings_12From version 12.1.2-maint.12.x (https://github.com/lbl-srg/modelica-buildings/archive/f04caa0b1ad7c9fb60746762ad73a96b9e67904a.zip) to 12.1.2-maint.12.x (https://github.com/lbl-srg/modelica-buildings/archive/927a6b461a7cba8b09d96ca503000d8032fb9529.zip)
Buildings_latestFrom version 14.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/2fc8e1e4c0c4995f1cee56bb378e24aafe799159.zip) to 14.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/953f9ed459ecc78ee0a037e8e1542de501192eb6.zip)
ThermofluidStream_devFrom version 1.3.0-main (c1424a852b1b50dc44521e06f4994f3cfc2d9089) to 1.3.0-main (ede8f2694c01c4e1e9475537452b9d6b447c16db)

Models Affected

AixLibAixLib.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 49.91 → 0.13
AixLibAixLib.Systems.HydraulicModules.Examples.Pump (sim)Compile → Simulate
AixLibAixLib.Systems.ModularAHU.Examples.DemandControlledAHU (sim)Simulate performance 0:02:08 → 0:08:00
AixLibAixLib.Systems.ModularAHU.Examples.EONERC_AHU2 (sim)Simulate performance 0:03:15 → 29.90
AixLibAixLib.Systems.ModularAHU.Validation.AHU2_Cooler (sim)Simulate performance 15.85 → 5.55
BuildSysProBuildSysPro.IBPSA.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 49.43 → 0.14
BuildingSystemsBuildingSystems.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 51.93 → 0.14
Buildings_11Buildings.Fluid.FixedResistances.BuriedPipes.Examples.TwoPipesConduit (sim)Compile → Verify
Buildings_11Buildings.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 52.87 → 0.15
Buildings_11Buildings.Templates.Components.Validation.Coils (sim)Compile → Verify
Buildings_11Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.MixedConvection (sim)Simulate performance 0.17 → 0:06:40
Buildings_11Buildings.ThermalZones.EnergyPlus_9_6_0.Examples.SmallOffice.Guideline36Winter (sim)Simulate → Compile
Buildings_11Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8 (sim)Verify → Simulate
Buildings_12Buildings.DHC.Plants.Combined.Examples.AllElectricCWStorage (sim)Compile → Simulate
Buildings_12Buildings.Fluid.FixedResistances.BuriedPipes.Examples.TwoPipesConduit (sim)Compile → Verify
Buildings_12Buildings.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 55.12 → 0.14
Buildings_12Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.MixedConvection (sim)Simulate performance 0.18 → 0:06:40
Buildings_12Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8 (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.FixedResistances.BuriedPipes.Examples.TwoBuriedPipes (sim)Simulate → Compile
Buildings_latestBuildings.Fluid.FixedResistances.BuriedPipes.Examples.TwoPipesConduit (sim)Simulate performance 0:01:03 → 0:01:50
Buildings_latestBuildings.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir (sim)Verify → Simulate
Buildings_latestBuildings.Fluid.HeatExchangers.Examples.WaterHeater_T (sim)Simulate → Verify
Buildings_latestBuildings.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 54.58 → 0.14
Buildings_latestBuildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8 (sim)Verify → Simulate
ClaRaClaRa.Components.VolumesValvesFittings.Fittings.Check.Test_Junction (sim)Verify → Simulate
ClaRa_devClaRa.Components.VolumesValvesFittings.Fittings.Check.Test_Junction (sim)Verify → Simulate
DynawoDynawo.Examples.RVS.TestCases.TestB.TestBNoSvcNoLoadReset (sim)Simulate → Compile
DynawoDynawo.Examples.Wind.IEC.Neplan.WPP4BCurrentSource2020FOCB (sim)Simulate → Compile
Dynawo_devDynawo.Examples.Nordic.TestCases.TestCase (sim)Simulate → Compile
Dynawo_devDynawo.Examples.Wind.IEC.Neplan.WT4BCurrentSource2015 (sim)Verify → Compile
Dynawo_devDynawo.Examples.Wind.IEC.Neplan.WT4BCurrentSource2015FOCB (sim)Verify → Compile
IBPSA_latestIBPSA.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 53.86 → 0.16
IDEASIDEAS.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 49.37 → 0.12
IDEAS_devIDEAS.Fluid.Interfaces.Examples.Humidifier_u (sim)Simulate performance 52.24 → 0.13
MEVMEV.Simulations.LinearControl.Scenario1 (sim)Simulate performance 0:01:55 → 28.20
MEVMEV.Simulations.LinearControl.Scenario2 (sim)Simulate performance 18.05 → 2.07
MEVMEV.Simulations.LinearControl.Scenario3 (sim)Simulate performance 10.39 → 2.13
MEVMEV.Simulations.LinearControl.Scenario4 (sim)Simulate performance 10.23 → 1.84
MEVMEV.Simulations.LinearControl.Scenario5 (sim)Simulate performance 27.60 → 3.91
MEVMEV.Simulations.LinearControl.Scenario6 (sim)Simulate performance 10.96 → 4.88
MEVMEV.Simulations.LinearControl.Scenario7 (sim)Simulate performance 24.00 → 6.55
MEVMEV.Simulations.OnOffControl.Scenario1 (sim)Simulate performance 38.10 → 4.79
MEVMEV.Simulations.OnOffControl.Scenario2 (sim)Simulate performance 0:01:20 → 6.89
MEVMEV.Simulations.OnOffControl.Scenario4 (sim)Simulate performance 20.70 → 3.23
MEVMEV.Simulations.OnOffControl.Scenario5 (sim)Simulate performance 0:01:16 → 4.13
MEVMEV.Simulations.OnOffControl.Scenario7 (sim)Simulate performance 30.15 → 10.02
ModelicaTest_3.2.3ModelicaTest.MultiBody.Joints.JointUSP2 (sim)Compile → Verify
ModelicaTest_3.2.3ModelicaTest.MultiBody.Joints.RevolutePlanarLoopConstraint (sim)Compile → Simulate
ModelicaTest_4.0.0ModelicaTest.MultiBody.Joints.JointUSP2 (sim)Compile → Verify
ModelicaTest_4.1.0ModelicaTest.MultiBody.Joints.JointUSP2 (sim)Compile → Verify
ModelicaTest_trunkModelicaTest.MultiBody.Joints.JointUSP2 (sim)Compile → Verify
Modelica_3.2.3Modelica.Electrical.Analog.Examples.AmplifierWithOpAmpDetailed (sim)Simulate → Verify
Modelica_4.0.0Modelica.Electrical.Analog.Examples.AmplifierWithOpAmpDetailed (sim)Simulate → Verify
Modelica_4.0.0Modelica.Electrical.PowerConverters.Examples.ACAC.SoftStarter (sim)Simulate performance 0:06:41 → 0:03:17
Modelica_4.1.0Modelica.Electrical.Machines.Examples.InductionMachines.IMC_YDarc (sim)Verify → Simulate
Modelica_4.1.0Modelica.Electrical.PowerConverters.Examples.ACAC.SoftStarter (sim)Simulate performance 0:06:37 → 0:03:08
Modelica_trunkModelica.Electrical.Machines.Examples.InductionMachines.IMC_YDarc (sim)Verify → Simulate
Modelica_trunkModelica.Electrical.PowerConverters.Examples.ACAC.SoftStarter (sim)Simulate performance 0:06:02 → 0:03:19
PhysiolibraryPhysiolibrary.Fluid.Examples.BloodGasesTransport.BloodyMary (sim)FrontEnd performance 10.57 → 23.40
PowerGridsPowerGrids.Examples.ENTSOE.TestCase3 (sim)Simulate → Verify
PowerGridsPowerGrids.Examples.IEEE14bus.IEEE14busGen2Disconnection (sim)Verify → Simulate
PowerGridsPowerGrids.Examples.Tutorial.GridOperation.Controlled.ControlledGridParametersChange (sim)Simulate → Verify
PowerGridsPowerGrids.Examples.Tutorial.GridOperation.Controlled.ControlledGridWithPSS (sim)Simulate → Verify
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_80_M_80 (sim)Verify → Failed
ScalableTestSuiteScalableTestSuite.Elementary.WhenEvents.ScaledExperiments.ManyEvents_N_8000_M_10 (sim)Templates → Verify
ScalableTestSuiteScalableTestSuite.Thermal.DistrictHeating.ScaledExperiments.HeatingSystem_N_10 (sim)Simulate → Verify
ScalableTestSuite_nooptScalableTestSuite.Thermal.DistrictHeating.ScaledExperiments.HeatingSystem_N_10 (sim)Simulate → Verify
ThermoPowerThermoPower.Test.DistributedParameterComponents.CheckFlow1DFV2phMassBalance (sim)Simulate performance 22.62 → 0.33
ThermoPowerThermoPower.Test.DistributedParameterComponents.TestFlow1D2phChen (sim)Simulate performance 34.09 → 3.12
ThermoPowerThermoPower.Test.DistributedParameterComponents.TestFlow1D2phDB_hf (sim)Simulate performance 55.97 → 2.93
ThermoPower_4.0.0-devThermoPower.Test.DistributedParameterComponents.CheckFlow1DFV2phMassBalance (sim)Simulate performance 22.94 → 0.35
ThermoSysProThermoSysPro.Examples.Book.PowerPlants.CombinedCyclePowerPlant.GasTurbineTrip (sim)Simulate performance 0:04:39 → 0:08:00
ThermoSysProThermoSysPro.Fluid.Examples.Book.PowerPlants.CombinedCyclePowerPlant.GasTurbineTrip (sim)Simulate performance 0:04:18 → 0:08:00
ThermoSysProThermoSysPro.Fluid.Examples.SimpleExamples.TestDynamicWaterHeating (sim)Simulate performance 0:07:01 → 0:01:11
ThermofluidStreamThermofluidStream.Boundaries.Tests.VolumesDirectCoupling (sim)Simulate performance 34.23 → 0:03:00
ThermofluidStream_devThermofluidStream.Boundaries.Tests.VolumesDirectCoupling (sim)Simulate performance 34.99 → 0:02:50
ThermofluidStream_devThermofluidStream.Idealized.Examples.AdiabaticThermodynamicModels.TableBased (sim)Simulate → Verify