OpenModelica v1.26 from 2026-04-26 23:39:48 to 2026-04-27 12:09:01

Summary

OMC Commits	1
Libraries Changed	1
Number of Improvements	2
Number of Regressions	4
Number of Performance Improvements	1
Number of Performance Regressions	2

OpenModelica Changes

Commit	Date	Author	Summary
f562d764c3	2026-04-27 09:59:51 +0200	Adrian Pop	Fix compilation on clang 21.1.8 (#15426)

OpenModelicaLibraryTesting Changes

Commit	Date	Author	Summary
1dd4db7	2026-04-19 14:25:16 +0200	Adrian Pop	force fetch of tags to handle the floating tag 'nightly' (#285)
e83c3f4	2026-04-14 08:15:53 +0200	Adrian Pop	cannot run python -m fmpy via check_output_log (#284)

Library Changes

Library	Change
Buildings_11	From version 11.1.1-maint.11.x (https://github.com/lbl-srg/modelica-buildings/archive/c378cb11f92b35977e2bcecf2df34bd512d2e1aa.zip) to 11.1.1-maint.11.x (https://github.com/lbl-srg/modelica-buildings/archive/e8d2b9b1d08ee9acad54c23d1d35029e31cdf8a3.zip)

Models Affected

AES	AES.Coursework.ThermSys_control_problems.Flow_pressure_control_liquids.Valve_linearisation_case_001a_DT_LargeScale (sim)	Simulate performance 40.31 → 0:01:23
Buildings_11	Buildings.DHC.ETS.Combined.Examples.ChillerBorefield (sim)	Verify → Compile
Buildings_11	Buildings.DHC.Examples.Combined.SeriesVariableFlowAgentControl (sim)	Templates performance 5.48 → 10.11
Buildings_11	Buildings.ThermalZones.EnergyPlus_9_6_0.Examples.SmallOffice.Guideline36Winter (sim)	Simulate → Compile
Buildings_12	Buildings.DHC.ETS.Combined.Examples.ChillerBorefield (sim)	Simulate → Compile
Buildings_latest	Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.MixedConvection (sim)	Simulate performance 0:13:20 → 0.18
Modelica_DeviceDrivers	Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_UDPAutoBufferSize (sim)	Compile → Simulate
Modelica_DeviceDrivers	Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_UDPWithoutReceiveThread (sim)	Compile → Simulate
ScalableTestGrids_noopt	ScalableTestGrids.Models.Type1.Type1_N_8_M_4 (sim)	Templates → FrontEnd