Non-Coplanar objects in 2D file

Fishpond.dgnAll-

Please check out the "O" in the attached DGN. I was hoping to just create a region to with a flood fill between the inner O and the Outer O but I am getting a "objects are not coplanar" error.

This is a 2D file so this shouldn't be an issue.

I'll probably figure out another way to skin this cat but if you have any quick ideas please let me know.

thanks

t.