OpenModelica newInst-newBackend from 2026-05-13 19:51:18 to 2026-05-14 12:19:27

Summary

OMC Commits1
Libraries Changed1
Number of Improvements44
Number of Regressions2
Number of Performance Improvements1
Number of Performance Regressions13

OpenModelica Changes

CommitDateAuthorSummary
c9aee90baf2026-05-14 09:33:47 +0200kabdelhak[NB] fix asserts in if-equations (#15557)

OpenModelicaLibraryTesting Changes

CommitDateAuthorSummary
1dd4db72026-04-19 14:25:16 +0200Adrian Popforce fetch of tags to handle the floating tag 'nightly' (#285)
e83c3f42026-04-14 08:15:53 +0200Adrian Popcannot run python -m fmpy via check_output_log (#284)

Library Changes

LibraryChange
Buildings_latestFrom version 13.0.1-master (https://github.com/lbl-srg/modelica-buildings/archive/6e0f19a25b5b4f8dfb620d8c68d10b537dfdec2d.zip) to 13.0.1-master (https://github.com/lbl-srg/modelica-buildings/archive/2470c3dd62a5410fb25752c7dc4fe9949921ffe0.zip)

Models Affected

AixLibAixLib.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
AixLibAixLib.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
AixLibAixLib.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
AixLibAixLib.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
AixLibAixLib.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
BuildSysProBuildSysPro.IBPSA.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
BuildSysProBuildSysPro.IBPSA.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
BuildSysProBuildSysPro.IBPSA.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
BuildSysProBuildSysPro.IBPSA.ThermalZones.ReducedOrder.Validation.RoomSteadyState (sim)FrontEnd → Failed
BuildingSystemsBuildingSystems.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
BuildingSystemsBuildingSystems.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
BuildingSystemsBuildingSystems.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
BuildingSystemsBuildingSystems.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
BuildingSystemsBuildingSystems.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
Buildings_11Buildings.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_11Buildings.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_11Buildings.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_11Buildings.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
Buildings_11Buildings.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
Buildings_12Buildings.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_12Buildings.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_12Buildings.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_12Buildings.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
Buildings_12Buildings.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
Buildings_latestBuildings.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_latestBuildings.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_latestBuildings.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Verify
Buildings_latestBuildings.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
Buildings_latestBuildings.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
IBPSA_latestIBPSA.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IBPSA_latestIBPSA.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IBPSA_latestIBPSA.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IBPSA_latestIBPSA.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
IBPSA_latestIBPSA.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
IDEASIDEAS.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IDEASIDEAS.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IDEASIDEAS.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IDEASIDEAS.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
IDEASIDEAS.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
IDEAS_devIDEAS.Media.Examples.PropyleneGlycolWaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IDEAS_devIDEAS.Media.Examples.WaterTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IDEAS_devIDEAS.Media.Specialized.Water.Examples.TemperatureDependentDensityTemperatureEnthalpyInversion (sim)FrontEnd → Simulate
IDEAS_devIDEAS.Utilities.IO.Files.Examples.WeeklySchedule (sim)FrontEnd → Templates
IDEAS_devIDEAS.Utilities.IO.Files.Validation.WeeklyScheduleWindowsLineEndings (sim)FrontEnd → Templates
Modelica_4.1.0Modelica.Mechanics.MultiBody.Examples.Loops.Fourbar1 (sim)
OpenIPSLOpenIPSL.Tests.Wind.GE.WT_Test (sim)Simulate performance 48.48 → 24.91
PlanarMechanicsPlanarMechanics.Examples.ControlledCraneCrab (sim)
PlanarMechanicsPlanarMechanics.Examples.CounterSpin (sim)
PlanarMechanicsPlanarMechanics.Examples.CraneCrab (sim)
PlanarMechanicsPlanarMechanics.Examples.CraneCrabTo3D (sim)
PlanarMechanicsPlanarMechanics.Examples.DoublePendulum (sim)BackEnd performance 38.13 → 0:01:12
PlanarMechanicsPlanarMechanics.Examples.FreeBody (sim)BackEnd performance 35.99 → 0:01:09
PlanarMechanicsPlanarMechanics.Examples.InvertedCraneCrab (sim)
PlanarMechanicsPlanarMechanics.Examples.KinematicLoop (sim)
PlanarMechanicsPlanarMechanics.Examples.KinematicLoop_DynamicStateSelection (sim)
PlanarMechanicsPlanarMechanics.Examples.Pendulum (sim)
PlanarMechanicsPlanarMechanics.Examples.PendulumExcited (sim)BackEnd performance 37.45 → 0:01:11
PlanarMechanicsPlanarMechanics.Examples.PistonEngine (sim)
PlanarMechanicsPlanarMechanics.Examples.PistonEngine_DynamicStateSelection (sim)
PlanarMechanicsPlanarMechanics.Examples.PowerDistanceDemo (sim)
PlanarMechanicsPlanarMechanics.Examples.SpringDamperDemo (sim)BackEnd performance 34.20 → 0:01:11
PlanarMechanicsPlanarMechanics.Examples.SpringDemo (sim)
PlanarMechanicsPlanarMechanics.Examples.WheelBasedCraneCrab (sim)
PlanarMechanicsPlanarMechanics.GearComponents.Examples.PlanetaryGear (sim)
PlanarMechanicsPlanarMechanics.VehicleComponents.Examples.SingleTrackWithEngine (sim)
PlanarMechanicsPlanarMechanics.VehicleComponents.Examples.TestAirDrag (sim)
PlanarMechanicsPlanarMechanics.VehicleComponents.Examples.TestDryFrictionWheel (sim)
PlanarMechanicsPlanarMechanics.VehicleComponents.Examples.TestIdealWheel (sim)
PlanarMechanicsPlanarMechanics.VehicleComponents.Examples.TestSlipBasedWheel (sim)
PlanarMechanicsPlanarMechanics.VehicleComponents.Examples.TwoTrackWithDifferentialGear (sim)
ScalableTestGrids_nooptScalableTestGrids.Models.Type1.Type1_N_4_M_4 (sim)Templates performance 22.44 → 45.05
ScalableTestGrids_nooptScalableTestGrids.Models.Type1.Type1_N_6_M_4 (sim)FrontEnd → Failed
ScalableTestGrids_nooptScalableTestGrids.Models.Type1.Type1_reduced_N_4_M_4 (sim)Templates performance 24.05 → 44.66
ScalableTestSuiteScalableTestSuite.Power.ConceptualPowerSystem.ScaledExperiments.PowerSystemStepLoad_N_64_M_4 (sim)Compile → Verify
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_40_M_40 (sim)Compile performance 26.97 → 49.21
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)BackEnd performance 13.37 → 25.82
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_80_M_20 (sim)Compile performance 34.91 → 0:01:15
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_40_M_40 (sim)FrontEnd performance 5.62 → 10.40 BackEnd performance 14.58 → 27.70
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_112_M_112 (sim)BackEnd performance 41.06 → 0:01:15 SimCode performance 12.97 → 28.36 Templates performance 23.15 → 41.81
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_56_M_56 (sim)Compile performance 0:01:36 → 0:03:30
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_80_M_80 (sim)Templates performance 10.37 → 19.52