[SCIP] Adding separating cuts at root node only

[Ambros Gleixner]

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
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-- 
Ambros Gleixner, Research Group Mathematical Optimization Methods at 
Zuse Institute Berlin, http://www.zib.de/gleixner