[Coin-lpsolver] Clp Executable Segmentation Fault

Tue Aug 8 07:08:20 EDT 2006

Brad,

The mps file had row entries starting in first column so "N z".  The mps
reader allows for some free format input but expects only section markers
e.g. ROWS to start in first column.  There was a bug in code in that it was
not returning correct error code.

John Forrest

             Brad Bell                                                     
             <bradbell at apl.was                                             
             hington.edu>                                               To 
             Sent by:                  coin-lpsolver at list.coin-or.org      
             coin-lpsolver-bou                                          cc 
             nces at list.coin-or         Gallagher Polyn                     
             .org                      <polyng at u.washington.edu>           
                                                                   Subject 
                                       [Coin-lpsolver] Clp Executable      
             08/07/06 07:13 PM         Sebmentation Fault                  

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 %%%%%%%%%%%%%%%%%%%%(See attached file:
neos.inp)_______________________________________________
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