Re: NCL 5.1.1 seg fault when drawing maps

Dear Mary,

With the new executable, everything is working fine. Thank you very much for your help!

Sincerely,

Adam Davis
BSE Earth System Science and Engineering - Meteorology 2010
Dept. of Atmospheric Oceanic and Space Sciences
University of Michigan - Ann Arbor

Quoting Mary Haley <haley_at_ucar.edu>:

> Hi Adam,
>
> A few people have had trouble with the Cygwin "ncl.exe" binary because
> of stack size issues.
>
> I created a new ncl.exe binary that has worked for some folks. If you
> want to give it a try, it's on anonymous ftp:
>
> ftp ftp.ucar.edu
> <log in as "anonymous">
> <Use email address as password>
> cd /pub/scd/haley
> get ncl_new.exe
> quit
>
> Once you have the file, gunzip it, make sure it is executable, and
> move it to $NCARG_ROOT/bin:
>
> gunzip ncl_new_exe.gz
> chmod gou+x ncl_new.exe
> mv ncl_new.exe $NCARG_ROOT/bin/.
>
> Now you can use this new NCL executable instead of the one already
> installed on your system:
>
> ncl_new.exe your_script.ncl
>
> If this works, you can replace your old ncl executable with this new
> one. You should first make a copy of your old one:
>
> mv $NCARG_ROOT/bin/ncl.exe $NCARG_ROOT/bin/ncl_old.exe
> mv $NCARG_ROOT/bin/ncl_new.exe $NCARG_ROOT/bin/ncl.exe
>
> ----------------------------------------------------------------------
>
> If this new executable doesn't work, then it would help if I could get
> your exact script and data. There's a special resource that you can
> set, and it will write out only the data I need to run your script:
>
> res_at_gsnDebugWriteFileName = "narrbug"
>
> Rerun your script with this resource, and it should create
> "narrbug.ncl" and "narrbug.nc". If you can email me these, then I'll
> give them a try here.
>
> Thanks,
>
> --Mary
>
>
>
> On Mon, 20 Jul 2009, Adam Davis wrote:
>
>> Dear NCL users,
>>
>> When I run a script that involves creating a map plot using NCL
>> 5.1.1, execution terminates with a segmentation fault at the point
>> where the map is drawn. For instance, when I run the second NARR
>> example script
>> (http://www.ncl.ucar.edu/Applications/Scripts/narr_2.ncl[1]) with the
>> -x option, the script executes normally until the "plot =
>> gsn_csm_contour_map..." line, where a segmentation fault occurs.
>>
>> The segmentation fault also occurs with version 5.1.1 in several
>> other scripts that I have written that draw maps, which all worked
>> correctly with version 5.0.0 (I don't know about version 5.1.0,
>> though). These scripts use a few different gsn_csm map functions
>> (gsn_csm_contour_map, gsn_csm_vector_scalar_map, and gsn_csm_map),
>> all of which seem to have this issue. I suspect that the problem is
>> occurring when the map is drawn because in a couple of these
>> scripts, I set gsnDraw and gsnFrame to False, then call a map
>> function, add polymarkers and text to the maps, and finally call
>> draw and frame to create the output, and running these scripts with
>> the -x option reveals that the segmentation fault doesn't occur
>> until the first call of draw. I have not encountered any problems
>> drawing XY plots or the like with version 5.1.1 - just maps.
>>
>> I am running NCL version 5.1.1 on Windows Vista SP1 under Cygwin/X
>> (uname -a outputs CYGWIN_NT-6.0 srbwks45150-01 1.5.25(0.156/4/2)
>> 2008-03-05 19:27 i686 Cygwin), although the same problem also arises
>> on my laptop running version 5.1.1 on Windows XP SP2 under Cygwin/X.
>> No warnings or errors are generated when this issue occurs besides
>> "Segmentation fault (core dumped)".
>>
>> If you need any additional details about this issue (more example
>> scripts, stack traces, etc.), please let me know and I will be glad
>> to provide them. Thank you in advance for any help you can provide!
>>
>> Sincerely,
>>
>> Adam Davis
>> BSE Earth System Science and Engineering - Meteorology 2010
>> Dept. of Atmospheric Oceanic and Space Sciences
>> University of Michigan - Ann Arbor
>>
>
>
>

Links:
------
[1] http://www.ncl.ucar.edu/Applications/Scripts/narr_2.ncl
Received on Tue Jul 21 2009 - 16:09:30 MDT