[SCIP] Adding separating cuts at root node only

[Felipe Serrano]

Hi

In this particular example, notice also that the function findSubtour gets
called in CONSCHECK as well!

Best,
Felipe

On Wed, Jul 15, 2020 at 5:23 PM Ambros Gleixner <gleixner at zib.de> wrote:

> Dear Naga,
>
> This could happen when a sub-SCIP heuristic is called in the tree.  You
> could check this by printing SCIPgetProbName(), since sub-SCIP
> heuristics typically append their name to the problem name of the
> original SCIP.
>
> Best,
> Ambros
>
>
> Am 15.07.20 um 16:51 schrieb Naga Venkata Chaitanya Gudapati -
> nagavenkata.gudapati at studio.unibo.it:
> > Hello SCIP community,
> >
> > I have created a constraint handler using the following piece of c++ code
> >
> > ObjConshdlr(scip, "subour", "subtour 3_constraints",
> >           1000000, -2000000, -2000000, 0, -1, 1, 0,
> >           FALSE, FALSE, TRUE, SCIP_PROPTIMING_BEFORELP,
> SCIP_PRESOLTIMING_FAST)
> >
> > I used the TSP example as foundation and followed the documentation
> here, https://www.scipopt.org/doc/html/classscip_1_1ObjConshdlr.php
> >
> > I am keeping sepafreq at 0 so that the cuts are only added at the root
> node. But I noticed that some of the functions of the constraint handler
> like findSubtour are still getting called after the branching starts. Is
> there something else I have to do?
> >
> > Thanks for the help,
> > Naga
> > _______________________________________________
> > Scip mailing list
> > Scip at zib.de
> > https://listserv.zib.de/mailman/listinfo/scip
> >
>
> --
> Ambros Gleixner, Research Group Mathematical Optimization Methods at
> Zuse Institute Berlin, http://www.zib.de/gleixner
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