I am trying to make a "Minecart Elevator" using command blocks. My main block has this command: /tp @e[type=MinecartRideable, r=21] ~ ~+3.3 ~
. When I don't have the , r=21
part, my command works, just without the radius. But, when I add the radius back in, I get this error:
You must specify which player you wish to perform this action on.
How can I fix this?