[DISLIN] Polar Grid

[MASI]

Hi,
in a polar graph if I define the position of the first label TOP or
BOTTOM,the grid doesn't show.
Is this a bug?

e.g.

dislin.polmod('top', 'clockwise')
dislin.polar (1.,0., 0.2, 0., 30.)
dislin.grdpol(3,16)