Simulink model freezes at 8% during compilation showing “updating library links blocks: started” in MATLAB 2024a

I am using MATLAB R2024a on Windows, and I am experiencing a consistent issue with one specific Simulink model. During simulation or code generation, the process freezes at 8% during compilation, showing the message “Updating library links blocks: started” in the lower left corner of the window. It remains stuck indefinitely at that stage.

Even if I try to cancel the build, MATLAB becomes unresponsive and eventually crashes, requiring a full restart. This happens almost every day, usually when reopening or restarting the model.

As a temporary workaround, I have been deleting the slprj folder and the .autosave file, and then running the command clear classes. After that, the model compiles normally again — but the issue reappears later.

This model uses several toolboxes, including:

• Aerospace Blockset
• Aerospace Toolbox
• UAV Toolbox
• Simulink, Simulink Coder, MATLAB core toolboxes.

The model does not use model references or custom libraries.

Has anyone experienced a similar freeze during “updating library links blocks”? Is there a more permanent fix or diagnostic step to prevent this issue?

Answer 1

[Jianxin Sun]

Hi, you can reach out to MathWorks technical support https://supportcases.mathworks.com/mwsupport/s/casetypeselection?language=en_US&c__caseParameter=productusage&s_tid=srlp_product to address this issue.