Re: Segmentation fault (core dumped) while using Cplex Python API

From	Akira Li <4kir4.1i@gmail.com>
Subject	Re: Segmentation fault (core dumped) while using Cplex Python API
Date	2014-06-02 02:34 +0400
References	<e2e379b4-b721-4d96-865e-8f39ac5c4dd7@googlegroups.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.10530.1401662078.18130.python-list@python.org> (permalink)

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varun7rs@gmail.com writes:

> Hello Everyone, 
>
> I am trying to solve a mixed-integer problem using Cplex Python API
> and I get this error Segmentation fault (core dumped). i am not able
> to figure out the reason for this.
> Traceback
>
> srva@hades:~$ python RW10.py --output test --logPath log --xml topology.xml
> Start Time: 2014-6-1-20-56-39
> CPLEX Parameter File Version 12.5.0.0
> CPX_PARAM_TILIM 3600
> CPX_PARAM_TRELIM 20000.00
> CPX_PARAM_EPGAP 0.03
> CPX_PARAM_EACHCUTLIM 2100000000
> CPX_PARAM_FLOWCOVERS 0
> CPX_PARAM_FLOWPATHS 0
> CPX_PARAM_CLIQUES 0
> CPX_PARAM_DISJCUTS 0
> CPX_PARAM_COVERS 0
> CPX_PARAM_ZEROHALFCUTS 0
> CPX_PARAM_MIRCUTS 0
> CPX_PARAM_MCFCUTS 0
> CPX_PARAM_IMPLBD 0
> CPX_PARAM_GUBCOVERS 0
> CPX_PARAM_AGGCUTLIM 3
>
> Completion Time: 972.63
> Num Columns: 1350888
> Num Rows: 25488
> Solving
> Segmentation fault (core dumped)
>
> A few lines from the log file:
>
> Completion Time: 972.63
> Num Columns: 1350888
> Num Rows: 25488
> Tried aggregator 1 time.
> MIP Presolve eliminated 12648 rows and 1321088 columns.
> MIP Presolve modified 180 coefficients.
> Reduced MIP has 12840 rows, 29800 columns, and 136000 nonzeros.
> Reduced MIP has 29800 binaries, 0 generals, 0 SOSs, and 0 indicators.
> Presolve time = 0.49 sec. (368.57 ticks)
>
> I would be grateful if someone can help me fix this.

Install and enable faulthandler
https://pypi.python.org/pypi/faulthandler/
to see where Segmentation fault happens


--
akira

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Segmentation fault (core dumped) while using Cplex Python API varun7rs@gmail.com - 2014-06-01 12:28 -0700
  Re: Segmentation fault (core dumped) while using Cplex Python API Gary Herron <gary.herron@islandtraining.com> - 2014-06-01 12:44 -0700
  Re: Segmentation fault (core dumped) while using Cplex Python API Akira Li <4kir4.1i@gmail.com> - 2014-06-02 02:34 +0400

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