testing if files exist

From: Matt Fearon (matthew.fearon AT XXXXXX)
Date: Fri Apr 11 2003 - 12:52:14 MDT

dear ncl users:

is there a way to test if a file exists and print that result? for example,
if i have the following statements where "test.grb" doesn't exist


with this, i receive a fatal error, but "f" still prints a missing value. is
there a way to check if "test.grb" exists before i use addfile?
suggestions are much appreciated.
thank you,

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