Number of edges not aligned with or perpendicular to non-empty directions
 

Hey all,

I'm trying to model a wind tunnel section with a flat plate going across from side to side, blockMesh works but in checkMesh I get the folowing message:
"Number of edges not aligned with or perpendicular to non-empty directions"

Does anyone know which changes I could try to make to fix this problem?

Thanks a lot,

Alex