Send Message Has no Receiver

So this is a part of a script I have attached to a wall:

SendMessage(“Cubelimit”);

Then this is the script attatched to the prefab of the cubes spawning from the wall when I shoot the wall:

function Cubelimit () {

print (“spawned!”);
}

It seems to say 'Send Message Cube Limit has no reciever.
Can you figure out what the problem is from this?

The sendMessage() function only works with scripts attached to the same gameObject, try GetComponent instead