nui focus trouble?

[lovswr]

Actually I'm not sure if this is a nUI error or just Lua in general but here goes. I get the error message in the pic any time I try to focus. It does not matter if I hit one of the "F" keys (say F2 for the tank in five man PUGS) or use the mouse & right click. I always select ignore, but then I think I am never really setting the focus. TIA.