OpenModelica v1.26-cpp from 2026-05-24 18:10:44 to 2026-06-01 07:56:24

Summary

OMC Commits1
Libraries Changed3
Number of Improvements2
Number of Regressions11
Number of Performance Improvements10
Number of Performance Regressions1

OpenModelica Changes

CommitDateAuthorSummary
e74480f2d02026-05-30 19:59:39 +0200Adrian PopFix #15649 with help of Claude Code - for maintenance/v1.26 branch (#15669)

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_11From version 11.1.2-maint.11.x (https://github.com/lbl-srg/modelica-buildings/archive/b736863a00be5f4c6497376c1bc4ee1913d15f97.zip) to 11.1.2-maint.11.x (https://github.com/lbl-srg/modelica-buildings/archive/0da762f99a9aaa59cab510be1d60a85485ef5cf1.zip)
SOFCPoliMiFrom version master (85098e6eef87802fc5a24ea56db0d6a6ccadbb38) to master (9f746df73206c265b72aebf7e70a207534b3e4ce)
ThermofluidStream_devFrom version 1.3.0-main (e43023fd5b731416a60a0f0db21791f71f0d2baf) to 1.3.0-main (6af367fa1140e1ea362fa482ae6564cc2d82371a)

Models Affected

Buildings_11Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.Validation.Measured_SmallScale (sim)Compile → Simulate
ModelicaTest_trunkModelicaTest.Blocks.FilterTests.AllOptions (sim)Simulate performance 54.62 → 20.79
OpenIPSL_2.0.0OpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents (sim)Templates performance 0:01:34 → 54.41
OpenIPSL_2.0.0OpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents2 (sim)Templates performance 0:01:34 → 52.25
OpenIPSL_2.0.0OpenIPSL.Examples.DAEMode.N44_Base_Case_Systems.Nordic44_Base_Case_StateEvents3 (sim)BackEnd performance 0:01:14 → 42.83
OpenIPSL_2.0.0OpenIPSL.Examples.DAEMode.N44_Original_Systems.Nordic44_Original_Case_Bus_Fault (sim)Templates performance 0:01:09 → 40.31
OpenIPSL_2.0.0OpenIPSL.Examples.DAEMode.N44_Original_Systems.Nordic44_Original_Case_Line_Opening (sim)Templates performance 0:01:16 → 44.73
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkCammarata (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkCammarataIndex1 (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkLinConcLosses (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkLinConcLossesHigherCurrent (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkNonLinConcLosses (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkNonLinConcLossesHigherPorosity (sim)Compile → Failed
SOFCPoliMiSOFCPoliMi.Tests.BenchmarkSalogniColonnaIEA (sim)Compile → Failed
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)Verify → Templates
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_80_M_80 (sim)BackEnd performance 0:02:42 → 0:01:33
ScalableTestSuiteScalableTestSuite.Thermal.Advection.ScaledExperiments.AdvectionReaction_N_1600 (sim)Simulate performance 22.25 → 42.44
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_320_M_5 (sim)Templates → Verify
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_10_M_10 (sim)Compile performance 21.01 → 12.30
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelica_N_80_M_80 (sim)BackEnd performance 0:03:42 → 0:01:55
ScalableTestSuite_nooptScalableTestSuite.Electrical.TransmissionLine.ScaledExperiments.TransmissionLineModelica_N_160 (sim)Compile performance 24.19 → 13.82
ThermofluidStream_devThermofluidStream.Examples.SimpleStream (sim)Verify → Simulate
ThermofluidStream_devThermofluidStream.Processes.Tests.CentrifugalPumpCharacteristics (sim)Verify → Simulate
ThermofluidStream_devThermofluidStream.Processes.Tests.Pump_dp_tau_centrifugal_DesignPoint (sim)Verify → Simulate