Why when I want to display NURBS normals they dont appear (both points and primitive) and even if they appear it looks totaly crazy (like random directed lines in flat nurbs grid) I tried different Scene renderes and result is always same.

Video Card GTX 580

Hi this is a me too. I'm gettting strange results with nurbs and normals.

Attached is a file that shows this. Walking through the provided examples, you can see how some of nurbs show a primitive normal - some don't. Also, the direction of the line sop seems to change the behavior of when a primitive normal shows up.