[Height]

i have made a house system. so its almost completeted. i also have a command called /mycars which allows user to see the cars that he bought, if user has no cars it will be displayed as empty carslot. its also shown in a dialog. so the system consist of houses varying from 1 carslot to 20 carslot. so for testing first i created a 20 slot house and bought it and purchased 20 cars. so when i use /mycars it get error and dialog is not displayed when i have a 20 slot house. but i also tested it with 10 slot. with 10 slot, it working fine and dialog is shown. but if we use more than 10 slot, dialog is not displayed and shows error. please help me to resolve my problem