[gradsusr] error in if command of grads

[chinh ta huu]

Dear Dave
    Thank for your interest.
my script is still normal when I remove "if" and "endif".
But I have not found any error, I really don;t understand.
I also work with Grads version 2.0.a9
Thank you

-- 
(Mr.) Ta Huu Chinh
National, Weather Forecasting Center, Ha Noi, Viet Nam.
No: 4th, Dang Thai Than, Hoan Kiem, Ha Noi
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Email: chinhth2010 at gmail.com
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