Echo Off?

[TarosVorn]

Hi All,
I hope this is the right place to post this.
I wondered if any of the guru's here could help me out.
I have a harvesting macro set up on my toons and wondered if there was a way to 'stifle' the messages that pop up in the chat window, such as 'you cannot mine from this object' (not the actual message, but you get the idea).
I wondered if the was an equivalent to 'echo off' that I could add to the macro.
I've looked at a few websites that have some of the '/' commands, but none mention these sort of commands.
Thanks in advance,

Taros.