With n = 1, the next simulation writes a payoff report (.rep) for the payoff definition set with SIMULATE>PAYOFF. With n = 0 it does not. SIMULATE>PAYOFF_REPORT is the same command.
When the payoff definition compares the model to data, the report also writes forecast error files: run_1step_err.dat for errors one step ahead. SIMULATE>KALMANSTEPS|k asks for k of them, run_1step_err.dat to run_kstep_err.dat, for errors one to k steps ahead. run is the run name.
SIMULATE>PAYOFF|calib.vpd
SIMULATE>REPORT|1
MENU>RUN|O
