Issues

• Rust re-simulate issue

  COMP/SimRT/Rust
  OpenModelica/OpenModelica#17449 · Filter by author ceraolo opened on Oct 23, 2026 · 1.28.0
  

• GBODE needs to be tested better

  COMP/SimRT/CCOMP/Testsuite
  OpenModelica/OpenModelica#17443 · Filter by author phannebohm opened on Oct 23, 2026
  1

  

• GBODE needs to be moved out of the OpenModelica code base and into its own repo

  COMP/SimRT/C
  Task

  OpenModelica/OpenModelica#17440 · Filter by author phannebohm opened on Oct 23, 2026
  1

  

• spatialDistribution can't handle large steps

  COMP/SimRT/C
  Bug

  OpenModelica/OpenModelica#17434 · Filter by author AnHeuermann opened on Oct 23, 2026 · 1.28.0
  

• Issue with connect statements after -d=mergeComponents

  COMP/OMC/New Backendtop priority
  OpenModelica/OpenModelica#17368 · Filter by author casella opened on Oct 20, 2026 · 1.28.0
  5

  

• Raising negative Real numbers to Real powers is deprecated by the MLS 10.6.7

  OpenModelica/OpenModelica#17365 · Filter by author casella opened on Oct 20, 2026
  13

  

• [NB] Generated derivative function is reused for a call where an input has zero derivative

  bugCOMP/OMC/New Backend
  OpenModelica/OpenModelica#17343 · Filter by author sjoelund opened on Oct 20, 2026
  

• Initialisation failure for discrete variable used only within a sampled algorithm

  COMP/OMC/Backend
  OpenModelica/OpenModelica#17335 · Filter by author albertoleva opened on Oct 19, 2026 · 1.28.0
  2

  

• omc doesn't support parallel invocation/compilation in same directory

  enhancement
  OpenModelica/OpenModelica#17327 · Filter by author VolkerStolz opened on Oct 16, 2026
  3

  

• Automatic matrix plot tiling

  COMP/GUI/OMEdittop priority
  OpenModelica/OpenModelica#17317 · Filter by author casella opened on Oct 14, 2026 · 1.28.0
  2

  

• [NB] Array operands next to an array constructor (fill, ones, {… for …}) are not subscripted with the extracted iterator

  COMP/OMC/New Backend
  OpenModelica/OpenModelica#17271 · Filter by author CSchulzeTLK opened on Oct 13, 2026 · 1.28.0
  

• Efficient code generation for large power system models

  COMP/OMC/New Backendenhancement
  OpenModelica/OpenModelica#17215 · Filter by author casella opened on Oct 9, 2026 · 1.28.0
  

• Assertions are swallowed inside a when statement

  COMP/OMC/Runtimeregression
  OpenModelica/OpenModelica#17213 · Filter by author cbu-hw opened on Oct 9, 2026 · 1.28.0
  12

  

• Duplicate model does not respect "save in one file" setting

  COMP/GUI/OMEdit
  OpenModelica/OpenModelica#17212 · Filter by author cbu-hw opened on Oct 9, 2026 · 1.28.0
  1

  

• [NB] when-statement with a time-event condition in an algorithm without outputs never fires

  OpenModelica/OpenModelica#17209 · Filter by author CSchulzeTLK opened on Oct 9, 2026 · 1.28.0
  

• OMEdit only allows to use gcc

  COMP/GUI/OMEditregressiontop priority
  OpenModelica/OpenModelica#17202 · Filter by author casella opened on Oct 8, 2026 · 1.28.0
  6

  

• Better handling of division-by-zero when solving for derivatives in the NB

  COMP/OMC/New Backendtop priority
  OpenModelica/OpenModelica#17180 · Filter by author casella opened on Oct 7, 2026 · 1.28.0
  

• Deprecate the old frontend

  COMP/OMC/Frontend
  OpenModelica/OpenModelica#17177 · Filter by author sjoelund opened on Oct 7, 2026 · 1.28.0
  3

• Old backend: solve ideal-switch loops as linear systems (linear for fixed relations)

  OpenModelica/OpenModelica#17173 · Filter by author sjoelund opened on Oct 7, 2026
  13

  

• Improve simulation performance of large-scale models with C runtime against WASM

  COMP/OMC/Codegenenhancement
  OpenModelica/OpenModelica#17157 · Filter by author casella opened on Oct 6, 2026 · 1.28.0
  4

  

• Fails to configure with CMake 4.5

  OpenModelica/OpenModelica#17154 · Filter by author yurivict opened on Oct 6, 2026

• Using uninitialized variables in functions should be an error.

  COMP/OMC/Frontendtop priority
  OpenModelica/OpenModelica#17149 · Filter by author casella opened on Oct 6, 2026 · 1.29.0
  7

  

• Modelica 3.7: Add variable values to assert messages

  COMP/SimRT/Cenhancementtop priority
  OpenModelica/OpenModelica#17147 · Filter by author cbu-hw opened on Oct 6, 2026 · 1.28.0
  

• Issue with stateSelection in ScalableTestGrids.Models.Type1.Type1_N_2_M_2 compiled with NB and -d=mergeComponents

  OpenModelica/OpenModelica#17132 · Filter by author casella opened on Oct 5, 2026

• The NB generates invalid daeMode C code for ScalableTestGrids.Models.Type1.Type1_N_1_M_1

  COMP/OMC/CodegenCOMP/OMC/New Backendtop priority
  OpenModelica/OpenModelica#17130 · Filter by author casella opened on Oct 5, 2026 · 1.28.0
  1