ErrorMonster

From WowAce Wiki

ErrorMonster is a small addon to block a few standard action errors from printing. Please note that it does not block the "Error Speech" that comes with them - you have to disable that in Sound Options.

Default Filters

* Ability is not ready yet.
* Not enough energy
* There is nothing to attack.
* That ability requires combo points
* Your target is dead
* Another action is in progress

Commands

ErrorMonsters slash commands are accessed through /errormonster or /em. Commands exist to list, add and remove filters to the blocking list.