[Coin-symphony] Retrieving solution

[Ted Ralphs]

Salvatore,

Your procedure seems OK, so I'm not sure what's wrong. Can you file a 
bug report here:

https://projects.coin-or.org/SYMPHONY/newticket

Please indicate the exact version you are using (stable/5.1 or one of 
the releases) and attach the MPS file that exhibits this behavior. That 
will make it easier for us to track this down. Thanks.

Cheers,

Ted

Salvatore Nocella wrote:
> Hi List!
> 
> Using SYMPHONY 5.1 I've noticed a strange behaviour retrieving the
> solution returned by the branch-and-bound. More in detail, I solve an
> {0,1}-LP by B&B as follows:
> 
> ENV_SYM = new OsiSymSolverInterface();
> ENV_SYM->loadFromCoinModel(*(CG->Model));
> ENV_SYM->setObjSense(-1);
> ENV_SYM->branchAndBound();
> 
> 
> The B&B procedure correctly prints out the optimal solution value and
> non-zero variables, but when I try to retrieve the solution vector as
> follows
> 
> x = (double*)ENV_SYM->getColSolution();
> 
> the vector x comes out undefined (i.e., for each i, x[i] has an
> undefined value, neither 0 nor 1).
> 
> Is there any error in my procedure, or what?
> 
> I'm looking forward to your replies
> Goodbye, Salvatore
> 
> ____________________________________
> Salvatore Nocella
> University of L'Aquila, IT
> _______________________________________________
> Coin-symphony mailing list
> Coin-symphony at list.coin-or.org
> http://list.coin-or.org/mailman/listinfo/coin-symphony


-- 
Dr. Ted Ralphs
Associate Professor
Industrial and Systems Engineering
Lehigh University
(610)758-4784
tkralphs at lehigh.edu
www.lehigh.edu/~tkr2