[SCIP] separating while counting feasible solutions

[James Cussens]

I have noticed that when SCIP is counting (and possibly collecting)
feasible solutions, separation is turned off.

What is the rationale for this?

In my own SCIP project having no separation led to very poor performance
when collecting feasible solutions with objective value better than a given
value. (I just want reasonably 'good' feasible solutions.)

I fixed the problem as follows:

SCIP_CALL( SCIPsetParamsCountsols(scip) );
         /* put separating back on! */
         SCIP_CALL( SCIPparamsetSetSeparating(scip->set->paramset,
scip->set, scip->messagehdlr, SCIP_PARAMSETTING_DEFAULT, TRUE) );

but perhaps keeping separation leads to some other problem I don't realise.

Any advice on this issue gratefully received.

James

-- 
James Cussens
Dept of Computer Science &
York Centre for Complex Systems Analysis
Room 326, The Hub, Deramore Lane            Tel    +44 (0)1904 325371
University of York                                        Fax  +44 (0)1904
500159
York YO10 5GE, UK                               http://www.cs.york.ac.uk/~jc
http://www.york.ac.uk/docs/disclaimer/email.htm
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.zib.de/pipermail/scip/attachments/20180515/7828ba2e/attachment.html>