OpenModelica v1.27-cpp from 2026-07-13 02:22:28 to 2026-07-26 20:22:21

Summary

OMC Commits3
Libraries Changed4
Number of Improvements22
Number of Regressions13
Number of Performance Improvements2
Number of Performance Regressions3

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)
d7e2907f412026-07-18 01:38:20 +0200arun3688ParModelica: fix -ltbb link error on MSYS2 ucrt64 (use -ltbb12) (#16066) (#16071)

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/0192839096eb88d9d260b9390bff8efa3bca02b5.zip) to 14.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/c4117ccec1f288ee6bc7f0ee0cb40a45d6940b0c.zip)
IDEAS_devFrom version 4.0.0-master (d5b721625ce5fc66ac53ed999921cfa598539e2a) to 4.0.0-master (5400f0d11564e9dced0330cd3b2c0f509ada6639)
ThermofluidStreamConfiguration hash (OMC settings or the testing script changed)
ThermofluidStream_devFrom version 1.3.0-main (6115f1350febbe082f25084b41740aa97660be82) to 1.3.0-main (46f52936b94de2c43a91dc0e82d1de3e1c05adee)

Models Affected

Buildings_11Buildings.Examples.DualFanDualDuct.ClosedLoop (sim)BackEnd performance 20.08 → 10.45
Buildings_11Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.Validation.Measured_SmallScale (sim)Compile → Simulate
Buildings_latestBuildings.Airflow.Multizone.Examples.TrickleVent (sim)Verify → Simulate
Buildings_latestBuildings.DHC.Examples.Combined.ETSHeatRecoveryHeatPump_BuildingTimeSeries.WithDHW (sim)Simulate → Compile
Buildings_latestBuildings.DHC.Examples.Combined.SeriesConstantFlow (sim)Compile → Templates
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.CoolingTowers.Examples.DryCooler (sim)Simulate → Verify
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
IDEAS_devIDEAS.Fluid.Storage.Examples.Stratified (sim)Compile performance 13.45 → 23.37
ModelicaTest_3.2.3ModelicaTest.Blocks.FilterTests.AllOptions (sim)Simulate performance 52.20 → 29.67
ScalableTestGrids_nooptScalableTestGrids.Models.Type1.Type1_N_8_M_4 (sim)Failed → SimCode
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)Verify → Templates
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_56_M_56 (sim)Templates → Verify
ScalableTestSuiteScalableTestSuite.Power.ConceptualPowerSystem.ScaledExperiments.PowerSystemStepLoad_N_64_M_16 (sim)Simulate performance 5.59 → 13.43
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_320_M_5 (sim)Templates → Verify
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)Verify → Templates
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_80_M_80 (sim)BackEnd performance 0:01:34 → 0:02:56
ThermofluidStreamThermofluidStream.Media.Tests.TestXRGMedia (sim)Verify → Compile
ThermofluidStream_devThermofluidStream.Examples.HeatPump (sim)Failed → Verify
ThermofluidStream_devThermofluidStream.Examples.VaporCycle (sim)Failed → Verify
ThermofluidStream_devThermofluidStream.FlowControl.Tests.PCV (sim)Verify → Simulate
ThermofluidStream_devThermofluidStream.HeatExchangers.Tests.Condenser (sim)Failed → Compile
ThermofluidStream_devThermofluidStream.HeatExchangers.Tests.Evaporator (sim)Failed → Compile
ThermofluidStream_devThermofluidStream.HeatExchangers.Tests.FlowRes (sim)Failed → Compile
ThermofluidStream_devThermofluidStream.HeatExchangers.Tests.Recuperator (sim)Failed → Compile
ThermofluidStream_devThermofluidStream.Media.Tests.TestXRGMedia (sim)Failed → Compile
ThermofluidStream_devThermofluidStream.Media.additionalMedia.Incompressible.Tests.TestLiqLoopDowcal100 (sim)Failed → Simulate
ThermofluidStream_devThermofluidStream.Media.additionalMedia.Incompressible.Tests.TestLiqLoopJP8 (sim)Failed → Simulate
ThermofluidStream_devThermofluidStream.Media.additionalMedia.SingleGasAndIncompressible.Tests.TestLiqLoopJP8DryAir (sim)Failed → Simulate
ThermofluidStream_devThermofluidStream.Processes.Tests.Pump (sim)Verify → Simulate
ThermofluidStream_devThermofluidStream.Undirected.HeatExchangers.Tests.TestDiscretizedHEXvsDir (sim)Failed → Verify