Maybe a stupid question.

So I have got the free trial of the multiboxing software but am running into an issue when logging in. I know this is probably an easy fix but do you need to have multiple accounts with multiple copies of Diablo 3 ROS or is there another way to multibox without having to spend money on those extra copies of the game. Any help is welcome!

[lax]

In order to multibox Diablo 3 (and most other games), you need multiple Battle.net accounts that have the game. Logging into Diablo 3 more than one time on the same Battle.net account results in the first instance getting disconnected. There is no other way to multibox Diablo 3, you must have purchased multiple copies of the game.

FAQ: Do I need multiple game accounts?