Bad DCanvas::CopyRect ---- Help!

I get a "Bad DCanvas::CopyRect" error when I run my wad with
-deathmatch and then hit Esc in zdoom. Anyone know why?

Better send that one to Randy. This is a C++ language error.

I have all the keys one the status bar as blank pics because they are not needed in deathmatch. For some reason that cuases zdoom to crash when I hit esc. You get the same error if you use offsets to push them off the screen.