Exclude error message for one command?

Hi,
I have only found how to set the system-setting for error messages off. however I just want to set it off for one command like
/use 13 (a trinket) in the case it was not ready, I do not want to hear the sound or see the error message for “it’s not ready yet”.
Any ideas?

http://www.curse.com/addons/wow/errorfilter