Question on multi-boxing in WOW

[kermdawg]

Hi. I got a couple accounts I want to multi-box on one computer. However I have two monitors and want each instance of wow on each monitor (i.e. 1 on 1 monitor, 1 on the other.)

When I try and set EITHER instance of wow to monitor 2 i get a interface/framexml/graphics.quality levels lua :300 attempt to compare number with nil error.

I am trying to run one off one graphics card and one off the other. Can this be causing it? Each monitor is hooked up to seperate graphics cards. No SLI or anything though.

[Ughmahedhurtz]

Are you running them in Windowed mode or full-screen? Full-screen has complications with regards to the designated "primary monitor." What two graphics cards are you running? What kind of system? Give us some info about your system we can work with, including what you're using to multibox (hardware, ISBoxer, etc.).

[MiRai]

You're getting the error because you cannot use DX11 on a monitor which:

1) Isn't assigned as your primary monitor in Windows
2) Isn't attached to your primary GPU

Setting your API to DX9 will fix all of that.