[Met_help] failed to run pcp_combine, please help me

John Halley Gotway johnhg at rap.ucar.edu
Tue Feb 17 21:58:11 MST 2009


Well I believe the error message you're seeing is telling you what's going

You ran the PCP-Combine tool in SUM mode and told it to look for 4 files
each containing 3-hourly accumulations that are valid at 20080603_120000.

So it's looking for these 4 files:
(1) 3-hourly accumulation valid at 20080603_030000.
(2) 3-hourly accumulation valid at 20080603_060000.
(3) 3-hourly accumulation valid at 20080603_090000.
(4) 3-hourly accumulation valid at 20080603_120000.

Then PCP-Combine will add those up and write them out.
However, the eror message is telling you that it can't find the 4th file
listed above in the directory "data/sample_fcst/2008060300" that you told
it to look in.

I'm guessing you created that directory "data/sample_fcst/2008060300"
because it wasn't included in the regular release of the MET.  So you'll
need to look at the files in that directory to see what's going on.

I'd suggest using the "wgrib" command to see what records each of your
GRIB files contain.  For example, the following command ...
   wgrib file.grb | grep "APCP"
Will list out information about each of GRIB records containing
accumulated precipitation.

Hope that helps.

John Halley Gotway
johnhg at ucar.edu

> Dear sir,
>      I failed to run ¡§pcp_combine¡¨
>  commad :$bin/pcp_combine \
>          $-sum 20080603_000000 3 20080603_120000 12 \
>          $tutorial/out/pcp_combine/sample_fcst_12L_2008060312V_12A.nc \
>          $-pcpdir data/sample_fcst/2008060300
> ********************* return message *************************
> Performing sum command: init_time/in_accum/valid_time/out_accum Times =
> 1212451200/10800/1212494400/43200
> Searching for 4 files with accumulation times of 3 hours to sum to a total
> accumulation time of 12 hours in data/sample_fcst/2008060300
> ERROR: sum_grib_files() -> Cannot find a file with a valid time of
> 20080603_120000 and accumulation time of 3 hours in
> data/sample_fcst/2008060300 matching the regular expression ".*"
> ****************************************************************
> I appreciated your kindness.
> Thank you very much.
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