FW: one contour level

[Lynette Bettio]

Hi,
hoping this is an easy question.
I have a script with which I read in a data file and graph results. In
this script I have each contour level set and an rgb colour for that
level.  Normally this works fine, data is read in and graphed, and
using cbarn the full colour range is displayed, even if the end
contours aren't reached. However, I recently put some data through and
the script produced a blank map - no shading or contour bar. I checked
the original file and where there weren't special characters the input
was all the same number (1). So I'm guessing from that and the error
messages that grads was unable to shade without at least two levels.
This number is in the range of my set contour levels (and a specified
contour level) and I would like to be able to display it with the
whole map (except for spec char areas) shaded the colour for the level
specified and display some form of cbarn underneath. I would appreciate
any help in this matter. Thankyou.
Regards,
Lyn