LAPACK: Unable to determine CPU type -> AMD 9950X

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Mike Ray
Mike Ray on 24 Sep 2025 at 3:25
Answered: dpb on 24 Sep 2025 at 15:06
I'm trying to do a plot, just simple plot(timestamps,values), annotating some text boxes, pretty basic stuff and I'm getting this no matter what I do:
LAPACK: Unable to determine CPU type
Error using \
LAPACK loading error:
No valid linear algebra library found for this architecture. lapack.spec is defective or the used architecture is not supported by MATLAB on this machine.
Error in matlab.graphics.controls.internal.PostUpdatePlugin.doCacheLoad
Error in matlab.graphics.controls.internal.PostUpdatePlugin>@()matlab.graphics.controls.internal.PostUpdatePlugin.doCacheLoad(canvasParent)
I'm running an AMD 9950X which isn't exactly a weird CPU, and I'm not sure how to get past this error.
I've replicated the error on R2024a and R2024b so far.

Answers (1)

dpb
dpb on 24 Sep 2025 at 15:06
Submit this to Mathworks as an official support request/bug at <Product Support Page>.
Provide a minimum working example that causes the problem and per the instructions supply version info, OS, etc., etc., ...

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