File not recognised

When I create a dxf file from sc4w rhino does not recognise the file format this is rhino 4 but has always worked previously

Hi David - can you post the file here (public), or send to tech@mcneel.com, with a link back here in your comments?

-Pascal

When I create a dxf file from sc4w and try to open it in rhino I get a message saying rhino does not recognise the file format