[gradsusr] Why isn't visibility plotted?

[giacomo tricarico]

Hi, I have a problem plotting surface visibility only:I'm using this code:........'clear''set gxout shaded''color 1 30 1 -kind steelblue->cyan->green->yellow->orange''d VISsfc/1000''cbarn'........
But everything is blank on the maps.The surface visibility is in the ctl files as:VISsfc  0 20,1,0  ** surface Visibility [m]so it does exist. Since it's in meters, I have divided all by 1000 to report in km (but also in meters it does not work).
What could I do?Thanks,
Giacomo 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20150822/f764f003/attachment.html