[SAC-HELP] can't change the header of SAC file

[Wisawet Wongwai]

Hi sac-helper,

Why I can't change the header of SAC file? You can see the screen shot
of this error at the attached file (*chsac_error.png 58K*).

pls help ...

Best -wwongwai
-- 
Wisawet Wongwai
PhD (Candidate) Earth Sci & Tech
Department of Earth Sciences,
Faculty of Science, Kasetsart University
Jatujak, Bangkok, 10900 THAILAND
(66) 8 1957 8171
w.wongwai at gmail.com,
g5417400297 at ku.ac.th
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