[GEMPAK #OGN-286449]: Error with NAGRIB/DCGRIB

Thank you for uploading the file. Here is what I learned:

 wgrib anom_R112.grb -V

Undefined parameter table (center 0-0 table 255), using NCEP-opn
rec 1:0:date 0000000000 PRES kpds5=1 kpds6=1 kpds7=0 levels=(0,0) grid=255 sfc 
anl:
  PRES=Pressure [Pa]
  timerange 10 P1 0 P2 0 TimeU 2  nx 256 ny 128 GDS grid 0 num_in_ave 0 missing 0
  center 0 subcenter 0 process 0 Table 255 scan: WE:SN winds(N/S) 
  latlon: lat  -89.297000 to 89.297000 by 1.406000  nxny 32768
          long 0.000000 to 358.594000 by 1.406000, (256 x 128) scan 64 mode 128 
bdsgrid 1
  min/max data 98276.6 101636  num bits 16  BDS_Ref 98276.6  DecScale 0 
BinScale -4


Notice the following definitions:

center 0 
subcenter 0 
process 0 
Table 255 

Running dcgrib2 I see the following:

dcgrib2 anom.gem < anom_R112.grb
Changing center table to cntrgrib1.tbl
Changing vertical coord table to vcrdgrib1.tbl
Changing WMO parameter table to wmogrib255.tbl


So the sequence of events that dcgrib2 takes is such:

* looks in cntrgrib1.tbl for a line matching center=0, find none
* looks in vcrdgrib1.tbl for a line matching the vertical coordinate (possibly 
found, unimportant)
* looks in wmogrib[table#].tbl for grib variable definition and finds no file 
wmogrib255.tbl

What I think you should do if you want to decode these files to GEMPAK is 
re-encore your grib1 files.

You need both a process ID (which is to be found in wmogrib[table#].tbl, see 
wmogrib128.tbl for a template), and you need a center ID that does not conflict 
with the existing center IDs found in
https://github.com/Unidata/gempak/blob/master/gempak/tables/grid/cntrgrib1.tbl



Michael James
Unidata Program Center
Boulder, CO


> Hi Michael,
> 
> I get the same error with dcgrib and dcgrib2 (see below).  It keeps asking 
> for wmogrib255.tbl and grib255.tbl, tables that I've never heard of and are 
> not included in the Gempak tables directory.
> 
> Nevertheless, I have updated a sample .grb file to the link you provided.  It 
> is called anom_R112.grb (they are SLP anomalies calculated from ERA-Interim, 
> then converted to a lat-lon grid).
> 
> Thanks for your help!
> 
> Regards,
> Shawn
> 
> 
> dcgrib2 test.gem  < anom_R111.grb
> Changing center table to cntrgrib1.tbl
> Changing vertical coord table to vcrdgrib1.tbl
> Changing WMO parameter table to wmogrib255.tbl
> Changing center parameter table to grib255.tbl
> TI_DAYM:  WARNING:  Invalid month =            0
> TI_DAYM:  WARNING:  Invalid month =            0
> 
> Dr. Shawn M Milrad
> Assistant Professor, Applied Meteorology
> Applied Aviation Sciences Department
> College of Aviation, Daytona Beach Campus
> Embry-Riddle Aeronautical University
> CoA 358A
> 600 S. Clyde Morris Blvd
> Daytona Beach, FL 32114-3900
> Phone:  386-226-7392
> Email:  address@hidden
> 
> -----Original Message-----
> From: Unidata GEMPAK Support [mailto:address@hidden]
> Sent: Monday, August 25, 2014 5:44 PM
> To: Milrad, Shawn M.
> Cc: address@hidden
> Subject: [GEMPAK #OGN-286449]: Error with NAGRIB/DCGRIB
> 
> 
> >
> > I have a bunch of ERA-Interim grib files I'm trying to convert to Gempak 
> > format.  I first used NCL to convert to a lat/lon grid, then used CDO to 
> > convert the lat/lon .nc files back to .grb.
> >
> > When I use either NAGRIB or DCGRIB to try to convert the new .grb files to 
> > .gem, I get the following error:
> >
> 
> Hi Sean,
> 
> I only see text for NAGRIB and not dcgrib2.  Likely the problem is caused by 
> missing grib tables.  What tables are trying to be found by dcgrib2?  If 
> possible, can you please upload an example grib2 file for me to use, at this 
> address:
> 
> http://motherlode.ucar.edu/repository/alias/gempakuploads/
> 
> 
> Michael James
> Unidata Program Center
> Boulder, CO
> 
> Ticket Details
> ===================
> Ticket ID: OGN-286449
> Department: Support GEMPAK
> Priority: Normal
> Status: Open
> 
> 

Ticket Details
===================
Ticket ID: OGN-286449
Department: Support GEMPAK
Priority: Normal
Status: Open