OpenModelica v1.26-fmi from 2026-05-23 21:36:15 to 2026-05-30 23:24:22

Summary

OMC Commits1
Libraries Changed3
Number of Improvements2
Number of Regressions10
Number of Performance Improvements2
Number of Performance Regressions3

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
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/12b7da357e27c7fb037eb4ec6fcd3e8c07f643b6.zip) warning: Failed to load settings: [json.exception.parse_error.101] parse error at line 3, column 2: syntax error while parsing value - invalid literal; last read: '"temp_AixLib_AixLib_Fluid_HeatPumps_Validation_ReciprocatingWaterToWater_Static_fmu"}_'; expected end of input OMSimulator v3.0.0.post139-g7930b1d-linux-debug info: 1 warnings info: 0 errors to 13.0.1-master (https://github.com/lbl-srg/modelica-buildings/archive/686c2dcea679e1f85361071afec5aa10f5b78f6b.zip) warning: Failed to load settings: [json.exception.parse_error.101] parse error at line 3, column 2: syntax error while parsing value - invalid literal; last read: '"temp_AixLib_AixLib_Fluid_HeatPumps_Validation_ReciprocatingWaterToWater_Static_fmu"}_'; expected end of input OMSimulator v3.0.0.post139-g7930b1d-linux-debug info: 1 warnings info: 0 errors
SOFCPoliMiFrom version master (85098e6eef87802fc5a24ea56db0d6a6ccadbb38) warning: Failed to load settings: [json.exception.parse_error.101] parse error at line 3, column 2: syntax error while parsing value - invalid literal; last read: '"temp_AixLib_AixLib_Fluid_HeatPumps_Validation_ReciprocatingWaterToWater_Static_fmu"}_'; expected end of input OMSimulator v3.0.0.post139-g7930b1d-linux-debug info: 1 warnings info: 0 errors to master (9f746df73206c265b72aebf7e70a207534b3e4ce) warning: Failed to load settings: [json.exception.parse_error.101] parse error at line 3, column 2: syntax error while parsing value - invalid literal; last read: '"temp_AixLib_AixLib_Fluid_HeatPumps_Validation_ReciprocatingWaterToWater_Static_fmu"}_'; expected end of input OMSimulator v3.0.0.post139-g7930b1d-linux-debug info: 1 warnings info: 0 errors
ThermofluidStream_devFrom version 1.3.0-main (e43023fd5b731416a60a0f0db21791f71f0d2baf) warning: Failed to load settings: [json.exception.parse_error.101] parse error at line 3, column 2: syntax error while parsing value - invalid literal; last read: '"temp_AixLib_AixLib_Fluid_HeatPumps_Validation_ReciprocatingWaterToWater_Static_fmu"}_'; expected end of input OMSimulator v3.0.0.post139-g7930b1d-linux-debug info: 1 warnings info: 0 errors to 1.3.0-main (6af367fa1140e1ea362fa482ae6564cc2d82371a) warning: Failed to load settings: [json.exception.parse_error.101] parse error at line 3, column 2: syntax error while parsing value - invalid literal; last read: '"temp_AixLib_AixLib_Fluid_HeatPumps_Validation_ReciprocatingWaterToWater_Static_fmu"}_'; expected end of input OMSimulator v3.0.0.post139-g7930b1d-linux-debug info: 1 warnings info: 0 errors

Models Affected

BuildSysProBuildSysPro.Building.Examples.ValidationDMvsSM (sim)Simulate → Compile
Buildings_latestBuildings.Examples.ScalableBenchmarks.BuildingVAV.Examples.TwoFloor_TwoZone (sim)Failed → Compile
OpenIPSL_2.0.0OpenIPSL.Examples.DAEMode.N44_Original_Systems.Nordic44_Original_Case_Bus_Fault (sim)SimCode performance 0:01:13 → 0:02:12
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
ScalableTestGrids_nooptScalableTestGrids.Models.Type2.Type2_tapEv___N_4_M_4 (sim)
ScalableTestGrids_nooptScalableTestGrids.Models.Type2.Type2_tapNoEv_N_4_M_4 (sim)
ScalableTestSuiteScalableTestSuite.Electrical.DistributionSystemAC.ScaledExperiments.DistributionSystemLinearIndividual_N_28_M_28 (sim)BackEnd performance 24.40 → 12.81
ScalableTestSuiteScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_64 (sim)Failed → Compile
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaActiveLoads_N_56_M_56 (sim)Simulate performance 15.46 → 5.63
ScalableTestSuite_nooptScalableTestSuite.Electrical.DistributionSystemDC.ScaledExperiments.DistributionSystemModelicaIndividual_N_80_M_80 (sim)Simulate performance 4.69 → 11.27
ScalableTestSuite_nooptScalableTestSuite.Elementary.SimpleODE.ScaledExperiments.CascadedFirstOrder_N_25600 (sim)BackEnd performance 18.13 → 33.33 Simulate performance 32.65 → 12.40
ThermofluidStream_devThermofluidStream.Examples.SimpleStream (sim)Verify → Simulate
ThermofluidStream_devThermofluidStream.Processes.Tests.CentrifugalPumpCharacteristics (sim)Verify → Simulate