MATLAB and optimisation tool automatically close while solving a large problem

MATLAB and optimisation tool automatically close while solving a large problem, I leave the program to run at night and in the day there are no programs running , I have tried the same optimisation for lesser number of variables and didn't face any problem in it.

[Walter Roberson]

Is it possible that your system goes into hybernation? Especially due to no user input? Historically there were a few cases where hibernation could kill MATLAB.

[Yashwardhan Panwar]

No , I have solved the exact same problem for a lower number of variables and in that case also MATLAB was running for about 14 hrs and it didn't got closed.