[OS] crash with glpk and OSSolverService

[Joe]

It's works great, thanks !

> type="B"  with
>
> type="B" ub="1.0"

Now glpk, cplex, cbc, symphony solve this problem without problems.

Thanks also for your timely response. (sorry for my late reply, it's
10pm here and i'm just getting out the diner).


On 19 avr, 21:11, Kipp Martin <kipp.mar... at chicagogsb.edu> wrote:
> Hi Joe:
>
> If, in all of the <var> elements, you replace
>
> type="B"  with
>
> type="B" ub="1.0"
>
> (in other words just add an upper bound of 1.0 on all the binary
> variables) it seems to work and gives the optimal value
>
> 1.06863e+06
>
> Can you live with this patch for now? As I mentioned in the prior email,
> I think there may be a problem with the Osi Glpk interface.
>
> 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.mar... at chicagogsb.eduhttp://gsbkip.chicagogsb.eduhttp://www.coin-or.org
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