OpenModelica v1.27-fmi-fmpy from 2026-06-14 19:44:52 to 2026-06-21 07:53:56

Summary

OMC Commits2
Libraries Changed3
Number of Improvements2
Number of Regressions4
Number of Performance Improvements7
Number of Performance Regressions13

OpenModelica Changes

CommitDateAuthorSummary
47273bfe962026-06-19 11:45:01 +0300Adrian PopPort several fixes from master (#15868)
04dcd6c1cd2026-06-16 13:36:00 +0200Adeel AsgharOMEdit fixes (#15850)

OpenModelicaLibraryTesting Changes

CommitDateAuthorSummary
d357aff2026-06-12 13:26:07 +0200AndreasFix OMSimulator submodule update when directory layout changes (#287)
12a01782026-06-06 12:43:09 +0200Adrian Popdrop v1.25 and add v1.27 (#286)

Library Changes

LibraryChange
Buildings_12From version 12.1.2-maint.12.x (https://github.com/lbl-srg/modelica-buildings/archive/d3a0ed3420e7949a9ca71d8965e00b04c9fab918.zip) FMPy version 0.3.29 to 12.1.2-maint.12.x (https://github.com/lbl-srg/modelica-buildings/archive/954bdb596b7b5da465309f930e0d74896222234a.zip) FMPy version 0.3.29
Buildings_latestFrom version 13.0.1-master (https://github.com/lbl-srg/modelica-buildings/archive/2c3c6c4a49b0aee70c96fbb48ac2cb9f6186eead.zip) FMPy version 0.3.29 to 13.0.1-master (https://github.com/lbl-srg/modelica-buildings/archive/8754785d1d873f7e49578c4368587dfb0e6e4300.zip) FMPy version 0.3.29
SOFCPoliMiFrom version master (9f746df73206c265b72aebf7e70a207534b3e4ce) FMPy version 0.3.29 to master (e059ad070d30e9d175fd853aedd372ba9b5efba1) FMPy version 0.3.29

Models Affected

AixLibAixLib.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 8.50 → 23.75
AixLibAixLib.Systems.ModularAHU.Validation.AHU2_Heater (sim)SimCode performance 13.60 → 4.84
Buildings_11Buildings.DHC.Plants.Combined.Validation.AllElectricCWStorage (sim)Failed → Compile
Buildings_11Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.MixedConvection (sim)Simulate performance 1.24 → 0:07:02
Buildings_12Buildings.DHC.ETS.Combined.Examples.ChillerBorefield (sim)SimCode performance 9.39 → 23.22
Buildings_12Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.MixedConvection (sim)Simulate performance 0:07:02 → 1.23
Buildings_12Buildings.ThermalZones.Detailed.Validation.MixedAirFreeResponseSteadyState (sim)SimCode performance 16.14 → 31.15
Buildings_latestBuildings.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 21.71 → 7.81
Buildings_latestBuildings.Templates.Plants.Controls.Pumps.Generic.Validation.StagingHeadered (sim)Compile performance 31.22 → 0:01:16
IBPSA_latestIBPSA.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 13.21 → 23.01
IDEAS_devIDEAS.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 10.68 → 22.18
Modelica_4.1.0Modelica.Electrical.PowerConverters.Examples.ACAC.SoftStarter (sim)Simulate → Compile
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkCammarata (sim)SimCode performance 14.28 → 33.23
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkCammarataIndex1 (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkLinConcLossesHigherCurrent (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkNonLinConcLosses (sim)SimCode performance 15.64 → 27.19
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkNonLinConcLossesHigherPorosity (sim)SimCode performance 15.13 → 30.76
ScalableTestSuiteScalableTestSuite.Electrical.TransmissionLine.ScaledExperiments.TransmissionLineModelica_N_640 (sim)Compile performance 0:04:11 → 0:02:01
ScalableTestSuiteScalableTestSuite.Elementary.WhenEvents.ScaledExperiments.ManyEvents_N_4000_M_10 (sim)SimCode performance 19.89 → 36.09
ScalableTestSuiteScalableTestSuite.Thermal.Advection.ScaledExperiments.AdvectionReaction_N_1600 (sim)Simulate performance 58.40 → 32.14
ScalableTestSuiteScalableTestSuite.Thermal.Advection.ScaledExperiments.AdvectionReaction_N_6400 (sim)Compile → Verify
ScalableTestSuiteScalableTestSuite.Thermal.DistrictHeating.ScaledExperiments.HeatingSystem_N_640 (sim)Compile performance 0:01:14 → 39.58
ScalableTestSuiteScalableTestSuite.Thermal.HeatExchanger.ScaledExperiments.CounterCurrentHeatExchangerEquations_N_1280 (sim)Verify → Compile
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_80_M_80 (sim)BackEnd performance 0:01:31 → 50.91 Simulate performance 5.58 → 12.92
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_80_M_80 (sim)Simulate performance 5.24 → 13.82
ThermofluidStreamThermofluidStream.Examples.VaporCycle (sim)Simulate performance 10.46 → 5.94