Issues

• BuildPlatformBinary in FMpy GUI version does not consider <IncludeDirectory> in buildDescription.xml for version 3.0 FMUs

  bug
  CATIA-Systems/FMPy#921 · Filter by author t-sommer opened on Oct 21, 2026

• Container FMU: fmi2FreeInstance segfaults when a component is an Optimica-compiled FMU

  CATIA-Systems/FMPy#919 · Filter by author hubertus65 opened on Oct 20, 2026

• Container FMU: updateConnections() interleaves get/set per connection, so components are evaluated with partially updated inputs

  CATIA-Systems/FMPy#918 · Filter by author hubertus65 opened on Oct 20, 2026

• Container FMU: connections between FMI 2.0 components are written with variableType "Real", which the runner rejects

  CATIA-Systems/FMPy#917 · Filter by author hubertus65 opened on Oct 20, 2026

• FMI 3: Clock attributes are not read, and ClockType is not supported

  CATIA-Systems/FMPy#911 · Filter by author joakimono opened on Oct 16, 2026

• FMI 3: wrong InitialUnknowns check for Clocks and clocked variables

  CATIA-Systems/FMPy#910 · Filter by author joakimono opened on Oct 16, 2026

• Parameter requireFunctions has no effect

  CATIA-Systems/FMPy#909 · Filter by author joakimono opened on Oct 16, 2026

• validate_fmu() drops archive problems if the model description is invalid

  CATIA-Systems/FMPy#908 · Filter by author joakimono opened on Oct 16, 2026

• FMI 3: setDebugLogging() must pass categories = NULL if nCategories = 0

  CATIA-Systems/FMPy#907 · Filter by author joakimono opened on Oct 16, 2026

• FMI 3: resourcePath must be NULL if the FMU has no resources folder

  CATIA-Systems/FMPy#906 · Filter by author joakimono opened on Oct 16, 2026

• FMI 3: variable attribute intermediateUpdate is not read

  CATIA-Systems/FMPy#905 · Filter by author joakimono opened on Oct 16, 2026

• getNumberOfVariableDependencies() always raises TypeError

  CATIA-Systems/FMPy#904 · Filter by author joakimono opened on Oct 16, 2026

• Wrong default nSensitivity in getAdjointDerivative() / getDirectionalDerivative()

  CATIA-Systems/FMPy#903 · Filter by author joakimono opened on Oct 16, 2026

• 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
  2

• 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