[gradsusr] problem sdfopen uwnd.mon.mean.nc

[Rusmawan Suwarman]

dear everyone

First of all, I am a beginner in grads and I have a problem in reading NCEP 
Reanalysis data in Grads.
I write the command : sdfopen uwnd.mon.mean.nc

and after that  this below text is appear:

Scanning self-describing file:  uwnd.mon.mean.nc
Definition of "kt" in "/usr/share/xml/udunits2-common.xml", line 86, overrides 
prefixed-unit "1000000 kilogram"
Definition of "microns" in "/usr/share/xml/udunits2-common.xml", line 296, 
overrides prefixed-unit "1e-15 second"
Definition of "ft" in "/usr/share/xml/udunits2-common.xml", line 393, overrides 
prefixed-unit "1e-12 kilogram"
Definition of "yd" in "/usr/share/xml/udunits2-common.xml", line 401, overrides 
prefixed-unit "8.64e-20 second"
Definition of "pt" in "/usr/share/xml/udunits2-common.xml", line 622, overrides 
prefixed-unit "1e-09 kilogram"
Definition of "at" in "/usr/share/xml/udunits2-common.xml", line 1019, overrides 
prefixed-unit "1e-15 kilogram"
Definition of "ph" in "/usr/share/xml/udunits2-common.xml", line 1537, overrides 
prefixed-unit "3.6e-09 second"
Definition of "nt" in "/usr/share/xml/udunits2-common.xml", line 1544, overrides 
prefixed-unit "1e-06 kilogram"
gadsdf: Error parsing time units in SDF file.

so what I have to do to open this file?

Thank you in advance
Rusmawan Suwarman
---------------------------------------------
Doctoral Students
Department of Life and Environmental Sciences
Graduate School of Sciences and Technology
Kumamoto University
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