Re: Support status for Netcdf-4

Hi Dave,
Supporting the full NetCDF4 format has required a lot of new code, and we have been realizing to our chagrin that there are a number of areas where our testing did not provide full coverage. Since the release of 6.1.0, there have been a number of bugs discovered and fixed, including the one you point out in your email. I think I can safely say that reading NetCDF4 in 6.1.0 is more reliable than writing NetCDF4, but there have been a few issues even with reading. We have decided to do a bug fix release (6.1.1.) as soon as we are convinced that we have fixed everything that has been reported so far, and once we have a more comprehensive set of test scripts that can run reliably.
We hope to release the new version within the next month or so. We will document the issues we know of in the "What's new in the current release" and I would have to say that support for full NetCDF4 should be considered alpha level in 6.1.0. We will also amend the statement you quoted in the supported file formats doc.
  -dave

On Dec 20, 2012, at 1:41 PM, Dave Allured - NOAA Affiliate wrote:

> NCL team,
>
> What is the support status for full Netcdf-4 format? The
> documentation for supported file formats says "Start from version
> 6.1.0, NCL supports all NetCDF 4 new data types". I assume this means
> full read and write support for Netcdf-4. However, the following
> attempt to create a full Netcdf-4 file fails on Mac OS 10.8.2:
>
> mac11:~/ncl/bugs/netcdf4 31> ncl
> Copyright (C) 1995-2012 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 6.1.0
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
> ncl 0> setfileoption ("nc", "Format", "NetCDF4")
> ncl 1> f = addfile ("test1.nc", "c")
> ncl 2> f->x = (/ 7., 8., 9. /)
> file: NclNewFile.c, line: 6850
> Could not get varnode->name: <x>
> Segmentation fault
>
> Note that this program works fine for the "NetCDF4Classic" format.
> Please clarify the documentation. Thank you.
>
> --Dave
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Received on Thu Dec 20 14:49:53 2012