[SCIP] problem with objective value

[Benjamin Müller]

Dear Sakib,

how large is the difference between what you expect and what SCIP is 
returning? Note that SCIP is using feasibility tolerances for deciding 
whether a constraint is satisfied or not. This could cause a difference 
in the order of 10^-6.

It would be nice if you could send me your python model, in case your 
objective values differ quite a lot.

Cheers,
Benny

On 05/24/2017 02:48 PM, sakib mondal wrote:
> Hi,
>
>
> I have a problem in which due to certain transformation, I have
> rewritten the objective function as a constraint.
>
>
> Original problem is max exp(cx) st constraint set C1.
>
>
> I rewrite it as max z st exp(cx)=z and constraint set C1.
>
>
> Scip solves it without any error or warning message. However, when I
> check the objective value (model.getObjVal() ), it is always giving a
> value which is different from the actual value (I compute it from the
>  optimum x value).  Even if I change the problem parameters,
> model.getObjVal() gives the same value.
>
>
> Also checked that model.getObjVal() is same as model.getVal(z)
>
>
>
> Wondering what could be the problem.  Thanks a  lot for the help.
>
>
> Regards
>
> Sakib
>
>
>
> _______________________________________________
> Scip mailing list
> Scip at zib.de
> https://listserv.zib.de/mailman/listinfo/scip
>

-- 
______________________________
Benjamin Müller
Zuse Institute Berlin
Takustr. 7, 14195 Berlin
benjamin.mueller at zib.de
+49 30 841 85-195