[Cbc] solving time in C++ >> time in Gams

[Christos]

i have the latest version, 2.7.7....

I solve it by using the default cbc solver, (i am not getting involved 
in the solver) with this way:

/solver1.loadProblem(numcols, numrows, start, index, value, collb, 
colub, obj, rowlb, rowub);
CbcModel model(solver1);
CbcMain0(model);
const char * argv2[]={"DAS","-solve","-quit"}; //
CbcMain1(3,argv2,model); /

So, i do not think that it's ommiting the presolve step, am i wrong?

Where can i find the latest version, and how can i load an mps file?

Thank you

On 9/10/2012 20:42, David Ibarra Gómez wrote:
> Hi,
>
> there are several things that can cause this:
>
>   * different solvers version,
>   * solving is a complex task: presolve (cuting planes, heuristics,
>     ...) and then branch and bound (cut). If you omit the first part
>     or you do not do exactly the same steps result could be different.
>
>
> Did you try to solve using CBC CLI (stand alone executable) ?
>
> Regards
>
> ------------------------------------------------------------------------
> Date: Tue, 9 Oct 2012 12:16:49 +0300
> From: chtsolak at gmail.com
> To: cbc at list.coin-or.org
> Subject: [Cbc] solving time in C++ >> time in Gams
>
> Hi all again,
>
> I have 1  question for you, if i solve it, i won't bother you again :-P
>
> I am using cbc in order to make an executable via MS visual studio 
> which solves a model.
> In order to solve it, takes 60 mins
>
> I have made the same problem with GAMS and solved it in 30 secs, 120 
> times faster!!
>
> Is it because of an error in modeling or due to the different 
> interface? (exe-GAMS)
>
> Why is there this enormous difference?
>
>
> Thank you in advance.//
> //
> //
> /
> /
> _______________________________________________ Cbc mailing list 
> Cbc at list.coin-or.org http://list.coin-or.org/mailman/listinfo/cbc

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