[SciPy-user] [OpenOpt] Segmentation fault

dmitrey dmitrey.kroshko@scipy....
Mon Jul 14 15:37:34 CDT 2008


hi Emanuele,
I have no idea and I have no experience of working with core dump files.
I can only guess that it's related to numpy (since OO have no other than 
python code). IIRC there ware some troubles with numpy version from 
channels (IIRC release 1.0.5) (however, other troubles with other 
output), AFAIK both Nils and I have numpy from latest svn.

Regards, D.

Emanuele Olivetti wrote:
> Emanuele Olivetti wrote:
>   
>> Dear all,
>>
>> Whenever I run example 'nlp_1.py' of OpenOpt (both tarball 0.18
>> and svn) on both my linux boxes I get "Segmentation fault"!
>> Or better, I get it 9 times out of ten (due to random
>> initialization without fixed seed, I guess).
>>
>> My configuration:
>> box1: Ubuntu Gutsy, amd64 (Intel C2D)
>> box2: Ubuntu Hardy, amd64 (Intel QuadCore)
>>
>> Python, Numpy, Scipy, Matplotlib etc. are standard versions
>> from Ubuntu repositories.
>>
>> Can anyone confirm/reproduce this behavior?
>>
>> I've a report that in i386 debian it seems to work flawlessly.
>>
>>   
>>     
>
> Here is the a full log on box1:
> ----
> /usr/lib/python2.5/site-packages/scikits/openopt/examples# python nlp_1.py
> OpenOpt checks user-supplied gradient df (shape: (150,) )
> according to prob.diffInt = [  1.00000000e-07]
> lines with 1 - info_user/info_numerical greater than maxViolation = 0.01
> will be shown
> max(abs(df_user - df_numerical)) = 1.72111294887e-05
> (is registered in df number 67)
> ========================
> OpenOpt checks user-supplied gradient dc (shape: (2, 150) )
> according to prob.diffInt = [  1.00000000e-07]
> lines with 1 - info_user/info_numerical greater than maxViolation = 0.01
> will be shown
> max(abs(dc_user - dc_numerical)) = 8.42460444801e-05
> (is registered in dc number 0)
> ========================
> OpenOpt checks user-supplied gradient dh (shape: (2, 150) )
> according to prob.diffInt = [  1.00000000e-07]
> lines with 1 - info_user/info_numerical greater than maxViolation = 0.01
> will be shown
> max(abs(dh_user - dh_numerical)) = 0.00043945014113
> (is registered in dh number 149)
> ========================
> -----------------------------------------------------
> solver: ralg   problem: unnamed   goal: minimum
>  iter    objFunVal    log10(maxResidual)  
>     0  8.596e+03               3.91
> Segmentation fault (core dumped)
> ----
>
> The core dump is available here:
> http://sra.fbk.eu/people/olivetti/tmp/core.bz2
>
>
> HTH,
>
> Emanuele
>
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