How to deactivate Matbal R2021b when I am getting errr 9

Hi. I need to deactivate and unistall R2021b (just upgraded to 2023b but I can't because to the error -9. Now R2023b wont't launch because I am exceeding the nr of license...

can anyone help?

Answer 1

[Mayank Sengar]

Kindly use the following documentation link for the deactivating and uninstalling the MATLAB R2021b.

For Deactivating the MATLAB: Deactivate Your Installation - MATLAB & Simulink (mathworks.com)

For Uninstalling the MATLAB: Uninstall MathWorks Products - MATLAB & Simulink

Regarding the license issue with MATLAB R2023b, you may want to contact MathWorks customer support for assistance.