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Re: EXTERNAL: Re: netcdf unlimited problem

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  • Subject: Re: EXTERNAL: Re: netcdf unlimited problem
  • Date: Wed, 01 Oct 2003 08:39:38 -0600
>To: address@hidden
>From: "Alan Dawes" <address@hidden>
>Subject: netcdf unlimited problem
>Organization: UCAR/Unidata
>Keywords: 200309230900.h8N90Rk1019944, IDL, LFS, Large File Support

Hi Alan,

On 24 Sept 2003, you wrote:

> I have found a random error with the netcdf library 
> (v3.5 32bit compiled with large file support) when 
> using the UNLIMITED keyword to extend beyond the 2GB
> limit. I am using the fortran interface. I am also
> running on an IBM SP2.
> 
> I believe I have found a bug with the library. Sometimes 
> the records are put in the wrong place within the file! 
> This does not happen all the time but is a random feature.

 ...

On 30 Sept 2003, you wrote:

> To some extent I am glad you haven't spent too much
> time on what I sent you. I have been using IDL to
> view my netcdf data files to see if they are correct.
> IDL has been showing me that there was an apparent 
> problem with the large data files.
> 
> However, one of my system guys has just found that 
> IDL has a bug when reading large netcdf files. We 
> have got a work around and have notified RSI about 
> it. When this is done the programs that I sent you 
> work fine!

Thanks very much for reporting back on this.  I was unable to
reproduce the problem under Solaris, so I thought it might be
platform-dependent, but you've just saved me from having to try to
reproduce it on an IBM SP2.  It's also good to know that IDL sometimes
has a problem reading netCDF files larger than 2 Gbytes, and I'll file
this information for future reference.

--Russ