[gradsusr] Variable Name

[Jason Warren]

Hello,

I downloaded a GEFS file, and I used wgrib2 to convert the file to 
netcdf format.  Using wgrib2, I looked at the variables in the grib 
file, and here is a sample:

74:13220199:d=2021012212:LHTFL:surface:0-3 hour ave fcst:ens-mean
75:13383726:d=2021012212:SHTFL:surface:0-3 hour ave fcst:ens-mean
76:13633911:d=2021012212:PWAT:entire atmosphere (considered as a single 
layer):3 hour fcst:ens-mean
77:13787635:d=2021012212:TCDC:entire atmosphere:0-3 hour ave fcst:ens-mean
78:13964039:d=2021012212:DSWRF:surface:0-3 hour ave fcst:ens-mean
79:14033256:d=2021012212:DLWRF:surface:0-3 hour ave fcst:ens-mean
80:14190680:d=2021012212:USWRF:surface:0-3 hour ave fcst:ens-mean
81:14279940:d=2021012212:ULWRF:surface:0-3 hour ave fcst:ens-mean
82:14401540:d=2021012212:ULWRF:top of atmosphere:0-3 hour ave fcst:ens-mean
83:14547338:d=2021012212:CAPE:180-0 mb above ground:3 hour fcst:ens-mean
84:14683912:d=2021012212:CIN:180-0 mb above ground:3 hour fcst:ens-mean
85:14774466:d=2021012212:PRMSL:mean sea level:3 hour fcst:ens-mean

I tried to plot the Mean Sea Level Pressure.  In my script, I used 'd 
PRMSL', however in GrADS, I get the following error:

Syntax Error:  Invalid Operand
   'prmsl' not a variable or function name
   Error ocurred at column 1
DISPLAY error:  Invalid expression
   Expression = prmsl

What am I doing wrong?

Thanks,
Jason Warren