[gradsusr] how convert grb2 data to ctl?

[Mostafa Karampoor]

when I  g2ctl.exe pgbhnl......grb2 >pgbhnl.ctl   and
gribmap -i pgbhnl.ctl this error
Open Error:  missing XDEF record
Open Error:  missing YDEF record
Open Error:  missing ZDEF record
Open Error:  missing TDEF record
Open Error:  missing UNDEF record
Open Error:  missing DSET record
Open Error:  missing VARS record
  The data file was not opened.
in windows
pleas help me
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