(number)
This entry allows instruction to the Challenge Maze Software about how long the name of each (room number).txt File is for all mazes.   The original and standard extension written in this entry when the Challenge Maze Software is downloaded is '4'.   It is not recommend that this entry be changed unless Maze Makers find it absolutely necessary to make a maze with more than 9,999 rooms.   If this number is changed it will cause all mazes to stop working if they have room files that have names with 4 characters.