[gradsusr] suppress warning message on graphic

[Becker, Bernd]

Happy new year!

To display a constant mask on the screen, I would like to suppress the
warning
message, stating:

Constant field.  Value = 1

'set warn off' does not help. 

what else should I try?

Many thanks!
Bernd.

--
Bernd Becker   Climate Impacts Product Development
Met Office Hadley Centre    FitzRoy Road  Exeter   Devon EX1 3PB  United
Kingdom
Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050
E-mail:bernd.becker at metoffice.gov.uk -
http://www.metoffice.gov.uk/research/our-scientists/seasonal-to-decadal/
bernd-becker