R2026a Prerelease Key Known Issues

MATLAB: Errors with "loadLiteRTModel" or "loadPyTorchExportedProgram" on macOS

Description: Usage of "loadLiteRTModel" or "loadPyTorchExportedProgram" functions in MATLAB to directly generate code from LiteRT or PyTorch ExportedProgram models will result in a crash in MACA platforms.

Workaround: None


5G Toolbox: Error when running the example 'Evaluate Performance of Cell-Free mMIMO Networks'

Description: The "Evaluate Performance of Cell-Free mMIMO Networks" example does not run and displays this error: "The class nr5g.internal.MACConstants has no Constant property or Static method named 'MCSTable'."

Workaround: None


Simulink: Errors with "LiteRT" or "PyTorch ExportedProgram" on macOS

Description: Using the "LiteRT" or "PyTorch ExportedProgram" blocks in Simulink to directly generate code from LiteRT or PyTorch ExportedProgram models will result in a crash in MACA platforms.

Workaround: None


Simulink: Visual rendering issues

Description: Some Simulink block icons may display visual rendering or alignment issues. For example, block icons may display misaligned or clipped text, missing or broken graphical boundaries, truncated port labels, or mild flickering when changing the zoom level. In some instances, block icons may appear smaller or larger than expected, such as in Quick Insert or Library Browser.

Annotations containing mathematical expressions may get rendered with formatting issues.

On macOS platforms, some widget controls may not appear in the native OS style.the "LiteRT" or "PyTorch ExportedProgram" blocks in Simulink to directly generate code from LiteRT or PyTorch ExportedProgram models will result in a crash in MACA platforms.

Workaround: None


Wireless Network Toolbox: Images missing from installed documentation

Description: In locally installed documentation for the Wireless Network Toolbox the images are missing.

Workaround: Use the web version of the documentation to view the images.


For more information on bugs potentially fixed in the prerelease, view the Bug Reports.

Questions?

If you have any questions, please submit a service request or call Technical Support at 508-647-7000.

Content updated: December 18, 2025

R2026a Prerelease

Preview and test the next product release.