[netCDF #OWN-203547]: Problem with ncdump

> Hi Russ,
> 
> Thanks for your quick response. I am using ncdump,
> HDF Version 4.2 Release 6, June 14, 2011.

OK, that's not Unidata software, it was written by HDF
developers a long time ago to test a netCDF version 2 API
for HDF4 data.  It can't read netCDF-3 or netCDF-4 data,
as far as I know, but only HDF4 data that was written with
the HDF4 API for the netCDF version 2 library.

Maybe Unidata's netCDF-3 or netCDF-4 software has been
installed somewhere else on Janus, with a version of ncdump
intended for reading netCDF files.  By the way, the ncdump
in our current release (netcdf-4.2.1.1) can read some HDF4
and HDF5 files through the netCDF-3 API, if it's built with
the right configure flags (--enable-hdf4) ...

If you can't find an existing installation, I recommend
building and installing from source, using the latest and
greatest release candidate:
 
  http://www.unidata.ucar.edu/downloads/netcdf/netcdf-rc/index.jsp

or the current operational release

  http://www.unidata.ucar.edu/downloads/netcdf/netcdf-4_2_1_1/index.jsp

following the instructions here:

  http://www.unidata.ucar.edu/software/netcdf/docs/building.html

--Russ

> I am trying to use ncdump on the Janus supercomputer
> at CU, which runs Redhat 5.5 Enterprise.
> 
> The name of the file is
> wrfout_d01_2000-01-24_12:00:00. I do not get an
> error message when running cat
> wrfout_d01_2000-01-24_12:00:00. It's 38 MB, so I
> don't think I can send it as an email attachment,
> unfortunately.

Thank you for not attaching that 38GB file!  I've been
dealing with netCDF files that size lately, and they qualify
as BigData on my desktop machine ...

--Russ

> ---- Original message ----
> 
> Date: Fri, 05 Apr 2013 13:41:46 -0600
> From: "Unidata netCDF Support"
> <address@hidden>
> Subject: [netCDF #OWN-203547]: Problem with ncdump
> To: address@hidden
> Cc: address@hidden
> >Hi Matt,
> >
> >> I'm trying to use ncdump to read a WRF output
> file,
> >> but am getting the following error: "***ncdump:
> >> ncopen failed on <file name>". I'm not sure
> what the
> >> problem is since I can use ncdump to open
> sample
> >> netCDF files that I download from UCAR's
> website.
> >> Any idea what's up?
> >
> >I need more information about the problem.
> >
> >What version of ncdump? Look at the last line of
> output
> >from running ncdump --version. If there is no
> version listed,
> >it's a very old and unsupported ncdump, so you
> may need to
> >upgrade.
> >
> >What platform are you running ncdump on? If it's
> an old version
> >of Windows, the port you have may have been
> created by a third
> >party before we started officially supporting
> building the
> >netCDF library and utilities from source on
> Windows. We also
> >now support binary downloads of netCDF for
> Windows.
> >
> >Can you run a different program than ncdump on
> the same file
> >from the same directory? For example, do you get
> an error message
> >from running "cat <file name>" ?
> >
> >Can you make the WRF output file available?
> >
> >--Russ
> >
> >Russ Rew UCAR Unidata Program
> >address@hidden http://www.unidata.ucar.edu
> >
> >
> >
> >Ticket Details
> >===================
> >Ticket ID: OWN-203547
> >Department: Support netCDF
> >Priority: Normal
> >Status: Closed
> >
> 
> 
Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: OWN-203547
Department: Support netCDF
Priority: Normal
Status: Closed