Could increase events in a running program?

Dear Experts,
I have a problem when I running a calculation for sheilding, Primary particle is not enough as shield too thick, can i increase scoring on the basis of the running model? or should i re-start under more primary particles?

Dear Eddie.

It is not possible to change the number of primaries of a running simulation, but it is possible to run additional jobs/cycles to increase the total number of primaries.