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Re: 20030129: Netcdf bug/feature: IEEE standard

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  • Subject: Re: 20030129: Netcdf bug/feature: IEEE standard
  • Date: Tue, 04 Feb 2003 13:43:48 -0700
>To: <address@hidden>
>From: =?iso-8859-1?Q?Peter_Gylling_J=F8rgensen?= <address@hidden>
>Subject: Netcdf bug/feature: IEEE standard
>Organization: Modelling group, Oceanography Section, Royal Danish 
>Administration of Navigation and Hydrography
>Keywords: 200301291233.h0TCXB620368 Alpha IEEE subnormal subnormalized floats

Hi Peter,

> I have been working for a while to solve some problems about reading
> netcdf files on our alpha servers. They have been producing core dumps
> caused by floating exceptions when reading netcdf files produced on
> our linux based production cluster.
> 
> The reason is the handling of the IEEE standard descriping
> subnormal/denormal floating point numbers.
> 
> The solution is mentioned in the link below, but I must say, that it
> is very difficult to find this solution, thus I will propose that you
> read the attached text file and consider providing this text as a part
> of the INSTALL.html file in the toplevel directory of the netCDF
> package.
>  
> http://www.unidata.ucar.edu/projects/coohl/mhonarc/MailArchives/netcdf/msg00176.html
> 
> A link in your section about known problems would also be appriciated.
> http://unidata.ucar.edu/packages/netcdf/known_problems.html

Thanks for tracking this down and writing the very clear explanation
of the problem.  I've added a note to the INSTALL.html file as you
suggested:

  http://www.unidata.ucar.edu/packages/netcdf/INSTALL.html#osf1

I also added an entry in the "Known Problems" document
containing your explanation:

  http://www.unidata.ucar.edu/packages/netcdf/known_problems.html#alpha-ieee

Please let me know if you see any changes that need to be made in
either of these.

> Otherwise your package (netcdf-3.5.1-beta10) was configured and
> compiled/installed without any problems.

Thanks.

--Russ

_____________________________________________________________________

Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu