Hello,
Yes I do agree with Naazira Badar on this. She is right in saying that your PC system memory does not suffice the large number of simulations you have set in iteration. I agree that the number of components you are using to design your whole system could also be large and hence even more memory is required.
I also agree that you may divide your iteration number such that each set runs successfully or else you could simulate on a system with a higher memory. I hope this will be very helpful to you.
Regards