Re: [Help-glpk] MPS file format, OBJSENSE

[usa usa]

Hi, Heinrich,

Thanks !

David

On Fri, Dec 18, 2015 at 11:46 AM, Heinrich Schuchardt <address@hidden> wrote:

Hello Andrew,

the MPS files in http://plato.asu.edu/ftp/lptestset/network/
contain keyword OBJSENSE, which can take values MIN and MAX.

Could you, please, consider adding support for this keyword in GLPK.

See "Objective Sense and Name in MPS Files" in
http://cgm.cs.mcgill.ca/~avis/courses/567/cplex/reffileformatscplex.pdf

@David
GLPK does not support the keyword currently. It will default to
minimization. Please, remove the keyword OBJSENSE and the value line
accompanying it.

Best regards

Heinrich Schuchardt

On 18.12.2015 16:52, usa usa wrote:
> Hi,
>
> I am trying to use Win GLPK 4.57
> (http://sourceforge.net/projects/winglpk/) to solve some large-sized
> linear programming models from Win 7 command line.
>
>     *glpsol.exe --mps FileName *
>
> I have downloaded some LP problems from
>
> http://www.cuter.rl.ac.uk/Problems/netlib.html
>
> But, when I sovled it with GLPK, I got error:  *missing indicator record*.
>
> I am not sure SIF format can be read by GLPK.
>
> and
>
> http://plato.asu.edu/ftp/lptestset/network/
>
> I got error: *invalid indicator record*
>
> Could someone recommand some websites where I can find large sized LP
> models (.mps or .lp) format so that I can solve them with GLPK 4.57.
>
> Any help would be appreciated.
>
> Thanks
>
>
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