OpenModelica v1.27-fmi-fmpy from 2026-07-19 12:36:51 to 2026-07-25 22:47:24

Summary

OMC Commits2
Libraries Changed2
Number of Improvements5
Number of Regressions6
Number of Performance Improvements7
Number of Performance Regressions6

OpenModelica Changes

CommitDateAuthorSummary
bf9d4f3aa52026-07-21 11:03:42 +0200AndreasSimulationRuntime: Fix segfault when spatialDistribution second output is unused (#16065) (#16095)
4470062c3a2026-07-21 01:34:36 +0300Adrian PopEmit the functions the FMIDERINIT jacobian calls (#16054) (#16068) (#16088)

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) FMPy version 0.3.29 to 14.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/c4117ccec1f288ee6bc7f0ee0cb40a45d6940b0c.zip) FMPy version 0.3.29
IDEAS_devFrom version 4.0.0-master (d5b721625ce5fc66ac53ed999921cfa598539e2a) FMPy version 0.3.29 to 4.0.0-master (5400f0d11564e9dced0330cd3b2c0f509ada6639) FMPy version 0.3.29

Models Affected

Buildings_11Buildings.DHC.ETS.Combined.Validation.ChillerBorefield (sim)SimCode performance 12.80 → 24.59
Buildings_12Buildings.DHC.ETS.Combined.Validation.ChillerBorefield (sim)SimCode performance 9.68 → 27.24
Buildings_12Buildings.DHC.Loads.BaseClasses.Examples.CouplingRCZ6 (sim)Failed → Verify
Buildings_12Buildings.ThermalZones.Detailed.Validation.BESTEST.Cases9xx.Case960 (sim)SimCode performance 5.83 → 10.94
Buildings_latestBuildings.DHC.Loads.BaseClasses.Examples.CouplingRCZ6 (sim)Verify → Failed
Buildings_latestBuildings.Fluid.DXSystems.Cooling.AirSource.Validation.SingleSpeed (sim)Verify → Compile
Buildings_latestBuildings.Fluid.DXSystems.Cooling.WaterSource.Examples.MultiStage (sim)Compile → Verify
Buildings_latestBuildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeDynamics (sim)Verify → Failed
Buildings_latestBuildings.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 13.48 → 7.29
Buildings_latestBuildings.Templates.Components.Validation.Coils (sim)Compile → Verify
IDEASIDEAS.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 13.65 → 7.84
IDEAS_devIDEAS.Fluid.Geothermal.Borefields.Validation.ConstantHeatInjection_100Boreholes (sim)SimCode performance 19.10 → 7.84
Modelica_4.1.0Modelica.Electrical.PowerConverters.Examples.ACAC.SoftStarter (sim)Simulate → Compile
Modelica_trunkModelica.Electrical.PowerConverters.Examples.ACAC.SoftStarter (sim)Simulate → Compile
PhysiolibraryPhysiolibrary.Organs.Lungs.Examples.MeanLungsTest (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkNonLinConcLossesHigherPorosity (sim)Failed → Compile
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemAC.ScaledExperiments.DistributionSystemLinearIndividual_N_20_M_20 (sim)Compile performance 0:04:11 → 0:01:54
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_28_M_28 (sim)Failed → Verify
ScalableTestSuiteScalableTestSuite.Electrical.TransmissionLine.ScaledExperiments.TransmissionLineModelica_N_640 (sim)SimCode performance 11.04 → 4.55
ScalableTestSuiteScalableTestSuite.Thermal.Advection.ScaledExperiments.AdvectionReaction_N_1600 (sim)Simulate performance 47.26 → 0:01:20
ScalableTestSuiteScalableTestSuite.Thermal.Advection.ScaledExperiments.SteamPipe_N_160 (sim)Compile performance 0:01:00 → 34.55
ScalableTestSuiteScalableTestSuite.Thermal.HeatConduction.ScaledExperiments.OneDHeatTransferTI_Modelica_N_1280 (sim)Compile performance 0:03:01 → 0:01:42
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_80_M_80 (sim)Simulate performance 6.32 → 12.26
ScalableTestSuite_nooptScalableTestSuite.Elementary.SimpleODE.ScaledExperiments.CascadedFirstOrder_N_25600 (sim)Simulate performance 12.25 → 30.12