[netCDF #BIJ-640778]: Error when a NetCDF file becomes bigger than 2.1 GB [DELFT3D-35792]

Hello Adri,

I'm afraid that 3.6.1 is no longer supported; it is certainly not tested 
against modern platforms or compilers.  The only suggestion I can make is to 
upgrade to the latest C (4.5.0) and Fortran (4.4.4) versions of the libraries.  
The C interface is available from 
http://www.unidata.ucar.edu/software/netcdf/winbin.html.  Alternatively, you 
may download the source code from https://github.com/Unidata/netcdf-c.  We do 
not currently provide binary installers for the Fortran libraries for Windows, 
but some users have reported success in compiling the Fortran code on Windows.  
The Fortran source code can be downloaded from 
https://github.com/Unidata/netcdf-fortran.

I'm sorry I can't provide a more immediately useful response, but I hope this 
helps,

-Ward

> Dear UniData,
>  
> We are using your NetCDF-3 source code, including the Fortran interface,
> on Windows. According to file "src/RELEASE_NOTES", the exact version
> is 3.6.1.
> 
> When the binaries are built with VisualStudio 2015 and Intel Fortran
> compiler 16 and when these binaries are used in a computation, a runtime
> error occurs when the NetCDF file becomes bigger than 2.1 GB. Debugging
> shows that it goes wrong on closing a NetCDF file. The size of the output
> file is obtained via calling the Microsoft function "fstat" (posixio.c,
> line 1635). "fstat" puts the file size in a structure called "stat" and
> returns 0 on success and a negative value when failed. Since "stat" is
> 32bit, "fstat" is resolved via "_fstat64i32", putting a 32bit value for
> the size of the file in "stat", which is negative when the file becomes
> bigger than 2.1GB. In VS2012 and lower "fstat" still returns success (is
> 0), although the reported size is negative. In VS2015, the implementation
> of "_fstat64i32" is changed, leading to a negative return value (failed)
> when the size is negative.
> 
> The bug can be fixed by the following changes in file posixio.c, in
> subrout ine ncio_filesize (line 1630):
> 
> 1. Replace the declaration "struct stat sb" by "struct _stat64 sb"
> 2. Replace the call to "fstat" by a call to "_fstat64" (this might not
> be necessary: replacing "stat" by "_stat64" might be enough)
> 
> Can you please answer the following questions:
> 
> 1. Is this a known problem?
> 2. What solution do you propose?
> 
> Thanks for your support.
> 
> Regards,
> 
> Adri
> 
> 
> Deltares
> 
> Adri Mourits
> Consultant
> 
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Ticket Details
===================
Ticket ID: BIJ-640778
Department: Support netCDF
Priority: Normal
Status: Closed
===================
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