[gradsusr] Converting Grib1 to Grib2

[TölvuposturfyrirRusl Smith]

Hi,

I'm trying to convert a grib1 file to grib2, with cnvgrib.  It was working
fine until I added the parameter "SP C" aka "Speed of current".
Then I get the error:

"param_g1_to_g2:GRIB1 param 48 not found. for table version 0".

I'm using the precompiled cygwin version from
http://www.iges.org/grads/downloads.html, which is version 1.1.7, not
the latest.

All help is appreciated.
Zetkopf
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