[Coin-lpsolver] Clp Executable Sebmentation Fault

[Brad Bell]

A student of mine (Gallagher Polyn) is using the Neos interface to the Clp
executable. When he sent the attached input file (neos.inp) he obtained a
segmentation fault (see below).

Perhaps this is a new bug for Clp ? Perhaps this problem has already been
fixed in the current version of Clp and Neos has not be updated ? In
either case, is it possible that the problem could be fixed so that he
could use the Neos interface for this problem ?

---------- Forwarded message ----------
Date: Mon, 7 Aug 2006 18:04:32 -0500
From: neos at mcs.anl.gov
To: bradbell at apl.washington.edu
Subject: NEOS Results for Job #815772

You are using the solver clp-mps.

\%%%%%%%%%%%%%%%%%%%% CLP Results %%%%%%%%%%%%%%%%%%%%

Load Avg: ( 0.0 , 0.01 , 0.22 )
Coin LP version 1.02.02, build Mar 20 2006
/bin/sh: line 1:  3003 Segmentation fault      nice -15 /home/neos/neos-bin/clp clp.mps - <clp.par
 Error (35584) in /home/neos/neos-bin/clp clp.mps - < clp.par


%%%%%%%%%%%%%%%%%%%% CLP Results %%%%%%%%%%%%%%%%%%%%
-------------- next part --------------
<document>
<priority>short</priority>

<category>lp</category>
<solver>Clp</solver>
<inputMethod>MPS</inputMethod>

<comments><![CDATA[
Problem A of take-home quiz, "Integer Programming"
mximize     x1 + x2 w.r.t. x in Z+^2
subject to 2x1 + x2  <= 5
 	    x1 + 2x2 <= 5
]]></comments>

<MPS><![CDATA[*
*Op Name0---  Name1---  Value1------   Name2---  Value2------
*23 56789012  56789012  567890123456   01234567  012345678901
NAME          Prob A
ROWS

N z
L r1
L r2

COLUMNS
     x1        z         1              r1        2
     x1        r2        1            
*
     x2        z         1              r1        1
     x2        r2        2

RHS
     b         r1        5
     b         r2        5
ENDATA
*]]></MPS>

<param><![CDATA[
maximize
primalSimplex
solution -
]]></param>

</document>