Change Min or Max number display

Hi all (@c:FlightPlanWaypointRemainingDistance) - 1852 / 550 * @CrzAltDisplay 100 * min)%!5d!% This end of code shows waypoint alt or FL in legs page of FMC. Using the macro it restricts the max FL to the FS9 flightplan cruise FL.This all works OK on loading but changing the macro value after does not change the number only removes last 2 digits from the original 5 digit number. Is changing Min or Max after loading possible or is there another way?