Stop MatLab from exiting

I work with MatLab 2019 b ( Simulink + Code )

Using Optimization Function to change PID values in the simulink project , after some time the MatLab just close , I don't know why or how to stop the exiting

By the Way :

I am Windows 10 - 64 Bit

16 GB Ram

and when I checked the processor speed from task manger it is saying 3-3.5 GHZ , even my windows saying its base speed 2.5 GHZ

How to make the windows never close the matlab