[Tinyos-help] What does SUCCESS refer to?

[Muhammad Azhar]

Hi,

  I know this is a rather basic question, but does SUCCESS in the return 
value of AMSend.send(x, y, sizeof(z)) refer to the fact that this node has 
successfully sent the packet (but may not have reached the receiver) or does 
it mean that the packet sent from this node has successfully reached its 
receiver?  If it's the latter, then it'll really make my life easier :P

Thanks

Azhar