I've never seen this message ever before

Screenshot 2023-11-18 131443

what does it mean?

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you find the explanation/solution here: https://helpcenter.steinberg.de/hc/en-us/articles/13338094735762-Error-message-on-Windows-MMCSS-priority-cannot-be-set-

Another similar discussion is here: Cubase 13 - "MMCSS priority cannot be set!"

Hope it helps.


thank you!

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For me, setting the threads to 64 with steinberg tool fixed it.

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Does this only affect midi performance?

The problem or the fix/work-around?

The problem affects general performance and reliability - Cubase 12 crashed or froze instead of displaying that message, or could have scheduling issues due to not being able to set the correct thread priority, while the work-around applies to all applications using MMCSS.


Hi Fabio…

I am still getting the MMCSS error message… quick question:
I am running a 14900K which has 32 threads… is there any difference in setting the utility to 64 threads or higher?