set misswarn

set misswarn on|off fnum

This command enables a warning message when GrADS is unable to open one of the data files in a templated data set. The fnum argument specifies which of the open files the warnings shall be applied to. The warning message will contain the name of the data file that was missing.


ga-> open hgt.ctl
ga-> set misswarn on 1
ga-> set t 1 last
ga-> d hgt
Warning: Open error, fn = /data/rean/
Cannot contour grid - all undefined values