Re: [netcdfgroup] netCDF-C 4.4.1 now available

  • To: Ward Fisher <wfisher@xxxxxxxx>
  • Subject: Re: [netcdfgroup] netCDF-C 4.4.1 now available
  • From: Mary Haley <haley@xxxxxxxx>
  • Date: Wed, 29 Jun 2016 11:16:14 -0600
Hi Ward,

Congrats on the new release!

This reminds me of a question that we have about the "conda" versions of
the NetCDF library that are served by Anaconda.

The official version of libnetcdf on Anaconda is according to this

However, if you look at this page:

it shows that the MacOS version of libnetcdf is actually at 4.4.0, and the
Linux/Windows version are at

Long story short: this causes us some grief when trying to build conda
packages against the default libnetcdf version, because they will have
different functionality for MacOS versus Linux/Windows. (CDF5 support is
one of them).

Do you know anything about this, or do you have any influence to get them
to upgrade to 4.4.0[1] for all systems?



On Tue, Jun 28, 2016 at 3:46 PM, Ward Fisher <wfisher@xxxxxxxx> wrote:

> Hello all,
> The final release for netCDF-C 4.4.1 is now available. This release
> provides official support for libhdf5 1.10.0; previous versions of netCDF
> will generate binary files which cannot be read on systems using older
> versions of libhdf5. A summary of changes between this official release and
> the previous release candidate are as follows:
>    - [File Change] Starting with release 4.4.1, netCDF-4 files created
>    will have superblock version 0 instead of superblock version 2, as was
>    observed in previous netCDF versions. This is due to a workaround required
>    to avoid backwards binary incompatibility when using libhdf5 1.10.x or
>    greater. Superblock versions 0 and 2 appear to be forward and backward
>    compatible. Other than a different superblock number the data should remain
>    consistent.
>    - [Enhancement] Added better error reporting when ncdump/nccopy are
>    given a bad constraint in a DAP url. See GitHub #279
>    <> for more information.
> Full release notes are available here
> <>.
> The following resources are available:
>    - Documentation:
>    - Tarball and zipfile downloads:
>       - Unidata hosted:
>       - GitHub hosted:
>    - Windows installer downloads:
> Thank you all for your patience and for all the feedback we have received!
> If there are any issues or questions with this release, please donât
> hesitate to let us know. Have a great day all!
> -Ward
> Ward Fisher
> wfisher@xxxxxxxx
> UCAR/Unidata - Software Engineer
> â
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