[ncl-talk] segmentation fault while using gsm_csn_xy

[Rick Brownrigg]

Hi Zhifeng,

I was able to run your script using 6.3.0, and as with 6.4.0, I get a plot
and do not get a SEGV. So I'm not sure what to say at this point. We
*might* be able to get some insight by running ncl under gdb, and then
performing a stack-trace once the SEGV occurs (let me know offline if
you're unsure how to do this).

Rick

On Mon, Apr 30, 2018 at 10:20 AM, Zhifeng Yang <yangzf01 at gmail.com> wrote:

> Hi Rick,
>
> Yes, you are right. I can run the script on NCL 6.4, but not on NCL 6.3.
> We are trying to install NCL 6.4 on our computer. However, can you run the
> script on NCL 6.3? If you can, I am wondering whether you will have the
> same error. And what caused this error? I narrowed down the error to that
> specific statement in gsn_code.ncl. However, I can not figure out why that
> statement caused the error. It's very interesting and may be a potential
> bug in NCL. I just guess.
>
> Best,
> Zhifeng
>
>
> On Mon, Apr 30, 2018 at 12:08 PM, Rick Brownrigg <brownrig at ucar.edu>
> wrote:
>
>> I was able to run your script, which produced the attached plot.  It also
>> produced the printed output below. The syntax error related to debugging
>> print statements you perhaps added to gsn_code.ncl (a print statement would
>> not be valid within a create-block), and the error at the end is because I
>> don't have all  the file. But otherwise, its working fine with the
>> development version of NCL. Are you able to upgrade to 6.4.0?
>>
>> Rick
>>
>> $ ncl arm_sgp_trend_line_diurnal.ncl
>>  Copyright (C) 1995-2017 - All Rights Reserved
>>  University Corporation for Atmospheric Research
>>  NCAR Command Language Version 6.5.0
>>  The use of this software is governed by a License Agreement.
>>  See http://www.ncl.ucar.edu/ for more details.
>> fatal:syntax error: line 12347 in file ./gsn_code.ncl before or near
>> print
>> print
>> ----^
>>
>> (0)    AAA01
>> (0)    NOW WORKING ON : 20171220
>> (0)    AAA02
>> (0)    AAA03
>> (0)    BBB03
>> (0)    BBB01
>> (0)    CC01
>> (0)    CC02
>> (0)    CC04
>> (0)    CC08
>> (0)    CC11
>> (0)    CC12
>> (0)    CC13
>> (0)    DD05
>> (0)    DD09
>> (0)    DD10
>> (0)    GG01
>> (0)    GG05
>> (0)    GG07
>> (0)    GG06
>> (0)    GG02
>> (0)    GG03
>> (0)    DD08
>> (0)    DD07
>> (0)    DD06
>> (0)    DD02
>> (0)    CC03
>> (0)    BBB02
>> (0)    NOW WORKING ON : 20171221
>> (0)    AAA02
>> warning:_NclOpenFile: cannot open file <./sgpco2flx4mC1.b1.20171221.0
>> 01500.nc>; No such file or directory
>>
>> fatal:file (f) isn't defined
>> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 70 in
>> file arm_sgp_trend_line_diurnal.ncl
>>
>>
>>
>> On Fri, Apr 27, 2018 at 3:01 PM, Zhifeng Yang <yangzf01 at gmail.com> wrote:
>>
>>> Hi all,
>>>
>>> I got a segmentation fault error while executing the following statement
>>> calling from gsn_code.ncl
>>>
>>>     plot_object = create wksname + "_xy" xyPlotClass wks
>>>         "xyCoordData" : data_object
>>>
>>> Here is the exact error.
>>>
>>> Segmentation fault (core dumped)
>>>
>>> The NCL version is 6.3.0. I also attached the ncl code and data. The
>>> main code is "arm_sgp_trend_line_diurnal.ncl", and subroutine is
>>> "plot_arm_sgp_trend_line_diurnal.ncl".
>>>
>>> and also the log file using "ncl -x code.ncl" (file name is
>>> ncl_x_code.txt)
>>>
>>> Best,
>>> Zhifeng
>>>
>>>
>>>
>>>
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>>
>
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