[OS] crash with glpk and OSSolverService

[Kipp Martin]

Hi Joe:

By the way, when I take your problem and replace "B" with "C" (i.e. make 
the problem continuous) I don't have any  problem with with 
OSSolverService and glpk. I get the optimal value 1.1025e+06.

My initial guess is that there is a problem with the Osi interface that 
we use to call glpk. (I am a typical developer, blame someone else). 
Have you tried to solve this problem using the Osi interface?

Do you have an mps version of the problem you could upload?

Thanks


> crash with glpk and OSSolverService
> 	envoyé par		gmail.com
> I encounter a (pure binary LP) problem with glpk solver through
> COIN-OR services. Please find the input problem in both (please mail
> me for getting these files < 100 Kb, i put a copy of these in FILES
> section of this google group)
>  1 - CPLEX format : sheet-0-problem.cplex
>  2 - OSIL format :sheet-0-problem.osil
> 
> When I try to solve my problem with regular glpk command line tool :
> $ glpsol --version
> GLPSOL: GLPK LP/MIP Solver, Version 4.26
> $ glpsol --cpxlp sheet-0-problem.cplex
> ...
> INTEGER OPTIMAL SOLUTION FOUND
> ...
> 
> It works fine. While I submit this problem through OSSolverService to
> glpk, it is making glpk crash :
> $ OSSolverService -solver glpk -osil sheet-0-problem.osil -osrl
> sheet-0-problem.osrl
> ...
> Start Solve with a Coin Solver
> SOLVER NAME =  glpk
> CREATING A NEW OPTIMIZATION SOLUTION
> ipp_basic_tech:  0 row(s) and 0 column(s) removed
> GLPK internal error: ipp != ipp; file glpk/src/glpipp02.c, line 803
> Aborted
> 
> Please note other solvers (-solver cbc, -solver symphony, -solver
> cplex) employed with OSSolverService succeeded !
> > 


-- 
Kipp Martin
Professor of Operations Research
and Computing Technology
Graduate School of Business
University of Chicago
5807 South Woodlawn Avenue
Chicago, IL 60637
773-702-7456
kipp.martin at chicagogsb.edu
http://gsbkip.chicagogsb.edu
http://www.coin-or.org

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