supress disable audio for macro to cast spell

[i214chess 0]

Any tips on how to disable error sound or printing of error messages for specific macro? Combat log will display (and I also hear error sound): `You fail to cast Fireball: No target.`. I bind hotkey to mouse scroll wheel up.

 

Here is a video, do you hear the clicking? the other casting noise too? https://streamable.com/3kkou

 

Quote

 

/console Sound_EnableSFX 0

/script if GetUnitName("target")==nil then TargetNearestEnemy() end

/cast Fireball

/console Sound_EnableSFX 1

/script UIErrorsFrame:Clear();

 

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UPDATE: http://www.evernote.com/l/AM8aGOXoH45OYqwDG7UrfR17SydQofnGyG0/

 

 

Edited November 6, 2017 by i214chess
update with answer