[Numpy-discussion] why Segmentation fault (core dumped)?

[Chao YUE]

Just one more sentence. We are using version 0.9.7 on our server. when I
tried to use:
f=nc.Dataset('file.nc') to open the file (either big or small) within
ipython, it works fine. Then when I tried to do
%run cal_cmi_big.py, core dumped error. but %run cal_cmi_small.py works
fine. The cal_cmi_big.py did work several days ago, I still have the file
generated by this script in my directory.

cheers,

Chao

2012/5/27 Chao YUE <chaoyuejoy at gmail.com>

> Dear Jeff,
>
> Thanks a lot for your reply. I think it might be related with the memory
> management on our sever. But anyway, as you suggested, I open an issue on
> netcdf4-python.google.co <http://netcdf4-python.google.com>m. you can
> find the data and script on ftp://ftp.cea.fr/incoming/y2k01/chaoyue/. The
> cal_cmi_big.py gave the core dumped error, in which I tried to operate with
> big files (~2G). The cal_cmi_small.py works fine, which  handles data only
> ~25M (a subset of big files). I used a small function (which use NetCDF4)
> in the script to read and write nc data with NetCDF4. You can also find
> this function in ncfunc.py. I tested all the script and data before I
> upload on our ftp.
>
> thanks again for your help,
>
> cheers,
>
> Chao
>
>
> 2012/5/26 Jeff Whitaker <jswhit at fastmail.fm>
>
>>  On 5/26/12 5:51 AM, Chao YUE wrote:
>>
>> Dear all,
>>
>> Previously I am able to run a script on our server but now it gave me a
>> Segmentation fault (core dumped) error.
>> try I tried the script with same type of netcdf file but with much
>> smaller file size and it works. So I think the error is related with memory
>> stuff.
>> I guess it's because our system administrator make some change somewhere
>> and that cause my problem?
>> the file size that cause the error to appear is 2.6G (in the script I
>> read this file with NetCDF4 to numpy array and make some manipulation),
>> the small one without error is only 48M.
>>
>>
>> Chao:  Without seeing your script, there's not much I can say.  I suggest
>> opening an issue at netcdf4-python.google.com, including your script as
>> an attachment.  You'll probably have to post the data file somewhere
>> (dropbox perhaps?) so I can run the script that triggers the segfault.
>>
>> -Jeff
>>
>
>
>
> --
>
> ***********************************************************************************
> Chao YUE
> Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
> UMR 1572 CEA-CNRS-UVSQ
> Batiment 712 - Pe 119
> 91191 GIF Sur YVETTE Cedex
> Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16
>
> ************************************************************************************
>
>


-- 
***********************************************************************************
Chao YUE
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
UMR 1572 CEA-CNRS-UVSQ
Batiment 712 - Pe 119
91191 GIF Sur YVETTE Cedex
Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16
************************************************************************************
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