[Pharo-users] Pharo FFI Error: "Could not coerce arguments"

Hello When trying out the FFI-Unix-Examples (X11Display class > #coloredEllipses or #coloredRectangels) I get the error: "Could not coerce arguments". When trying x11Draw I get a MNU: receiver of "display" is nil. I am running Pharo2 on NetBSD 6.1. I know this is not the usual Linux/MacOS/Windows, but everything else works fine, except for FFI. I am thinking I am quite close to getting FFI to work, just the from of the pragma that is wrong. Any help is much appreciated.