The terrain T key

Hi all
Has anybody had any problem using the T key to produce the terrain in a new route in RW 3 ?
Has anybody had any problem using the T key to produce the terrain in a new route in RW 3 ?
https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=29&t=3558