Issues

• FMPy (GUI version) calls fmi2/3DoStep with non constant step-size even if the FMU provides canHandleVariableCommunicationStepSize = false

  CATIA-Systems/FMPy#901 · Filter by author TorstenBlochwitz opened on Oct 13, 2026

• Fixed-step solver in FMPy GUI does not use "Step Size" as integration step size but "Max Samples"

  CATIA-Systems/FMPy#900 · Filter by author TorstenBlochwitz opened on Oct 12, 2026

• Segmentation fault in fmi2Instantiate when an FMI 2 FMU is simulated without logger after a simulation with a logger

  CATIA-Systems/FMPy#899 · Filter by author nl78 opened on Oct 11, 2026

• Apply an SSV parameter file (listed via fmi-ls-ref and contained in the corresponding /extra subdirectory) to an FMU

  CATIA-Systems/FMPy#897 · Filter by author chrbertsch opened on Sep 26, 2026

• fmpy-gui by default displays a lot of non-present outputs for FMI3 FMUs

  CATIA-Systems/FMPy#890 · Filter by author chrbertsch opened on Sep 8, 2026

• FMU with many Inputs / Outputs

  bug
  CATIA-Systems/FMPy#883 · Filter by author Franzisdrak opened on Jul 10, 2026
  1

• CVode ME simulation regressed in 0.3.30: CV_TOO_CLOSE on models with time events

  bug
  CATIA-Systems/FMPy#882 · Filter by author AnHeuermann opened on Jul 7, 2026
  2

• FMPy is very slow with verbose FMU

  CATIA-Systems/FMPy#880 · Filter by author nl78 opened on Jun 16, 2026

• FMI3 capability flag providesDirectionalDerivatives not supported

  bug
  CATIA-Systems/FMPy#878 · Filter by author CarstenOldemeyer opened on Jun 15, 2026
  1

• Remoting code is not FMI-3 compatible

  CATIA-Systems/FMPy#875 · Filter by author nl78 opened on May 13, 2026

• simulateME ignores terminate parameter

  CATIA-Systems/FMPy#873 · Filter by author tobiaslatour opened on May 11, 2026

• Issues with detection of Visual Studio installations

  CATIA-Systems/FMPy#866 · Filter by author m-kessler opened on Apr 21, 2026

• Python code style pep8 / black

  CATIA-Systems/FMPy#864 · Filter by author windelbouwman opened on Apr 16, 2026

• FMPy-0.3.29 regression compared to FMPy-0.3.21

  CATIA-Systems/FMPy#863 · Filter by author adrpo opened on Apr 15, 2026
  1

• Provide compatibility information

  CATIA-Systems/FMPy#854 · Filter by author chrbertsch opened on Mar 18, 2026

• fmpy.simulation.simulate_fmu tries to sample Input values

  CATIA-Systems/FMPy#838 · Filter by author nl78 opened on Dec 17, 2025
  2

• Plot in generated jupyter notebook not visible

  bug
  CATIA-Systems/FMPy#830 · Filter by author m-kessler opened on Dec 12, 2025
  2

• Support for FMI Layered Standard (FMI-LS-BUS)

  CATIA-Systems/FMPy#823 · Filter by author marl0rd opened on Nov 22, 2025
  3

• Make sundials more flexible depending on the Linux version

  CATIA-Systems/FMPy#818 · Filter by author Closius opened on Oct 31, 2025

• Unable to change tunable parameters using either apply_starting_values, setReal() or start_values

  CATIA-Systems/FMPy#814 · Filter by author ehmara opened on Oct 8, 2025
  2

• add_remoting() not listening to validate=False

  CATIA-Systems/FMPy#813 · Filter by author tjohanssonn opened on Oct 3, 2025

• Question: Restoring FMU state across sessions for perpetual/batch simulation fails with access violation

  CATIA-Systems/FMPy#812 · Filter by author prafull-cognite opened on Sep 30, 2025
  2

• Update CVode to build with CMake 4.1+

  enhancement
  CATIA-Systems/FMPy#808 · Filter by author t-sommer opened on Sep 17, 2025

• Display dependencies in case of failure of LoadLibray

  enhancement
  CATIA-Systems/FMPy#806 · Filter by author nl78 opened on Sep 11, 2025
  2

• Broken links in documentation

  CATIA-Systems/FMPy#805 · Filter by author clagms opened on Sep 4, 2025