Re: Error when writing global attributes in Netcdf-4 classic file

Dave,

I have got the .zip.
I'll check on this and will let you know what we find.

Thanks,

Wei

huangwei@ucar.edu
VETS/CISL
National Center for Atmospheric Research
P.O. Box 3000 (1850 Table Mesa Dr.)
Boulder, CO 80307-3000 USA
(303) 497-8924

On Apr 1, 2013, at 8:41 PM, Dave Allured - NOAA Affiliate <dave.allured@noaa.gov> wrote:

> NCL support team,
>
> This program results in a seg fault error on program exit, after
> attempting to overwrite some global attributes in a Netcdf-4 classic
> file with HDF5 compression. Note that all three global attributes
> exist previously in the target file, before running the test program.
>
> After the error, the target file is corrupted. This error is
> strangely sensitive to the number and string lengths of the attributes
> to be written. Can you please tell me what the problem is? Thank
> you.
>
> begin
> outfile = "out.nc"
> system ("cat ozone.master.nc > " + outfile) ; create fresh writable copy
>
> out = addfile (outfile, "w")
> out@last_update = systemfunc ("date")
> out@last_update_program = "demo.global-atts.ncl version 2013-apr-01"
> out@last_update_source_file = "ei.ozone.1979010106.nc"
> print ("Update complete.")
> end
>
> I get the same results with NCL versions 6.0.0 and 6.1.2. My system
> is Mac OS 10.8.3 on a 64-bit Intel Mac desktop. Here is the console
> output:
>
> mac56:~/ncl/bugs/3-atts/401i 491> ncl demo.global-atts.ncl
> Copyright (C) 1995-2013 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 6.1.2
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
> (0) Update complete.
> Segmentation fault
>
> mac56:~/ncl/bugs/3-atts/401i 492> ls -trgo
> total 44136
> -r--r--r-- 1 11294147 Apr 1 17:14 ozone.master.nc
> -rw-r--r-- 1 570 Apr 1 19:51 demo.global-atts.ncl
> -rw-r--r-- 1 11294201 Apr 1 20:16 out.nc
>
> mac56:~/ncl/bugs/3-atts/401i 493> ncdump -k ozone.master.nc
> netCDF-4 classic model
>
> mac56:~/ncl/bugs/3-atts/401i 494> ncdump -k out.nc
> ncdump: out.nc: NetCDF: Can't open HDF5 attribute
>
> mac56:~/ncl/bugs/3-atts/401i 495> uname -a
> Darwin mac56 12.3.0 Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10
> PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64 x86_64
>
> I uploaded the program and original Netcdf file (11 Mbytes) to
> ftp.cgd.ucar.edu/incoming, as
> "demo.global-atts.dave_allured.0401.zip". The original Netcdf file
> was also made by NCL 6.1.2 and a different script. I can also send a
> copy of the generating script and its input file, if you need it.
> Please let me know. Thanks for taking a look at this.
>
> --Dave A.
> NOAA/PSD/CIRES Climate Analysis Branch
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Received on Mon Apr 1 20:57:56 2013