OpenModelica v1.26 from 2026-04-30 15:52:34 to 2026-05-01 18:07:48

Summary

OMC Commits1
Libraries Changed2
Number of Improvements7
Number of Regressions4
Number of Performance Improvements4
Number of Performance Regressions2

OpenModelica Changes

CommitDateAuthorSummary
9154da1efe2026-05-01 10:37:37 +0200Adrian Pophopefully git describe work fine now (#15472)

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 13.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/7df5bc254da93cf70aa6045a41f537290366fe09.zip) to 13.0.0-master (https://github.com/lbl-srg/modelica-buildings/archive/f47ab63e5b9225e09135b5acea620b05180097aa.zip)
ThermofluidStreamFrom version 1.2.0 (https://github.com/DLR-SR/ThermofluidStream/archive/8d2287a558d9d5e3a6235c981d5a60044dae5b61.zip) to 1.3.0 (https://github.com/DLR-SR/ThermofluidStream/archive/e43023fd5b731416a60a0f0db21791f71f0d2baf.zip)

Models Affected

AixLibAixLib.Controls.HVACAgentBasedControl.Examples.BookTrading.NetworkCommunication2 (sim)Simulate performance 0:08:00 → 0.13
Buildings_11Buildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.GFunction_100boreholes (sim)Verify → Simulate
Buildings_12Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.MixedConvection (sim)Simulate performance 0:06:40 → 0.19
Buildings_latestBuildings.DHC.Examples.Combined.SeriesVariableFlowAgentControl (sim)Templates performance 11.25 → 5.67
Buildings_latestBuildings.DHC.Plants.Combined.Examples.AllElectricCWStorage (sim)Compile → Simulate
Buildings_latestBuildings.Fluid.Geothermal.Borefields.BaseClasses.HeatTransfer.ThermalResponseFactors.Validation.GFunction_100boreholes (sim)Simulate → Verify
Modelica_DeviceDriversModelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_MQTT (sim)Compile → Simulate
Modelica_DeviceDriversModelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_UDPWithoutReceiveThread (sim)Simulate → Compile
ThermofluidStreamThermofluidStream.Boundaries.Tests.PhaseSeperator (sim)Compile → Verify
ThermofluidStreamThermofluidStream.Boundaries.Tests.VolumesDirectCoupling (sim)Simulate performance 0:01:30 → 0:16:39
ThermofluidStreamThermofluidStream.Examples.ReverseHeatPump (sim)Simulate performance 0:04:00 → 0:07:51
ThermofluidStreamThermofluidStream.Examples.SimpleAirCycle (sim)Simulate → Verify
ThermofluidStreamThermofluidStream.Examples.SimpleCoolingCycle (sim)Verify → Simulate
ThermofluidStreamThermofluidStream.Examples.SimpleStream (sim)Simulate → Verify
ThermofluidStreamThermofluidStream.HeatExchangers.Tests.Condenser (sim)Simulate performance 21.66 → 11.93
ThermofluidStreamThermofluidStream.Processes.Tests.Flow_Resistance (sim)Simulate → Verify
ThermofluidStreamThermofluidStream.Processes.Tests.Pump (sim)Verify → Simulate