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20000606: NCNOFILL and "NOT A NETCDF FILE"

Denise,

> To: address@hidden
> From: "Denise Maddix" <address@hidden>
> Subject: Possibe netCDF bug in version 3.4
> Organization: LLNL
> Keywords: 200006061554.e56FsMT15293

In the above message, you wrote:

> I have been using netCDF 3.4 and have encountered a problem that does not
> occur with netCDF 2.4, in a large dispersion code I have written.  I have
> written a small test code only using netCDF calls and the same problem occurs.
> 
> I am defining two arrays, 3D and 4D with the last dimension being the
> unlimited time dimension and I am using the ncsfil call not to fill the
> data.  I am using dynamic memory allocation to allocate space for the
> two arrays.
> 
>  When I use the ncsfil command with option, "NCNOFILL", I
> get no error in the code for any reason.  However, when I use ncdump to
> dump the netCDF file, I get the message, "NOT A NETCDF FILE."  I know I
> am not overflowing memory, since I have written a very small test code
> to check this.  The error only occurs for small sized arrays.  I have
> also verified the problem does not occur when I load with netCDF 2.4.
> 
> Have you ever heard of a problem like this?

No, I've never encountered this problem before.

Does the test program close the netCDF file with a call to NCClOS()
before exiting?

> Denise Maddix
> Computer Scientist
> Lawrence Livermore National Laboratory
> (925)- 423-4236
> address@hidden

Regards,
Steve Emmerson   <http://www.unidata.ucar.edu>