at line it only accepts, as an offset into the future, from 2 to 31 days, otherwise an error is reported as from attached pics (Draw1 is correct, with 31, while Draw2 returned an error as soon as I incremented the variable to 32).
Is this a limit or a bug?
Making it a strategy and GRAPHing all variables, the future dates calculated are GRAPHed correctly, so there should be no error in the calculation code.