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[netCDF #GYC-914895]: Reading of file produces corrupted data

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  • Subject: [netCDF #GYC-914895]: Reading of file produces corrupted data
  • Date: Thu, 29 Aug 2013 09:59:30 -0600
Hi Stefan,

> When I compile the program run.f90 with
> 
> gfortran run.f90 -o run -lnetcdff -L/home/z3439823/programs/netcdf/lib 
> -I/home/z3439823/programs/netcdf/include
> 
> and run it, the data in data_in.nc is read partially corrupted. The program
> outputs the last data entry as 0.0, and not -1.84714535003628, which is the
> last value in
> 
> ncdump -v ctns data_in.nc
> 
> The command
> 
> ncdump -v ctns data_out.nc
> 
> shows that the output data is partially corrupted (about the last third of
> the data is bad).
> 
> I have tried to understand what's going on, but I have no clue. I do the
> exact same procedure with other datasets of identical size and type, and it
> works as it should.
> 
> I use netcdf-4.2.1.

Using our latest snapshot release of the netCDF C and Fortran-90 libraries,
I can reproduce the error you're seeing, though I don't understand yet 
what the cause is.  It appears to be a bug in the netCDF F90 library, but
I'll need to spend more time studying the problem in a debugger.

Thanks for reporting this potentially serious problem, and for providing
the demonstration program.  I'm entering the problem in our bug-tracking
system, where you can follow any progress we make in finding and fixing
the bug:

  https://bugtracking.unidata.ucar.edu/browse/NCFORTRAN-23

--Russ

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



Ticket Details
===================
Ticket ID: GYC-914895
Department: Support netCDF
Priority: Normal
Status: Closed