[Scip] Problem with ObjConshdlr

[Benjamin Müller]

Dear Demetrio,

do you have created and added a constraint belonging to you constraint 
handler? If you did not add such a constraint then SCIP (of course) 
thinks that there is nothing to do in the SCIP_DECL_CONSSEPALP callback 
since there is no constraint which can be handled by your constraint 
handler.

If this is your current problem then have a look at the TSP example of 
SCIP. There is a constraint handler which handles the subtour 
elimination constraints. To really exclude subtours one has to add a 
constraint via the SCIPcreateConsSubtour method in ReaderTSP.cpp. After 
this call there is a constraint belonging to the constraint handler and 
then it is possible to do several things in the SCIP_DECL_CONSSEPALP 
callback.

Best regards,
Benny

Am 31.10.2014 um 15:07 schrieb Demetrio Laganà:
> Dear SCIP mailing list,
> I have a problem when using ObjConshdlr. More precisely, I have 
> implemented the virtual methods from this class and included them in 
> the main.cpp of my NetBeans project through SCIPincludeObjConshdlr. It 
> seems to me that something does not work, because during the flow 
> execution of the code only the constructor of this class is run 
> without printing any message included 
> into SCIP_DECL_CONSSEPALP(ConshdlrMaxTime::scip_sepalp) function. Can 
> you help me?
> Thanks in advance
> Best regards
> Demetrio Laganà
>
>
> _______________________________________________
> Scip mailing list
> Scip at zib.de
> http://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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.zib.de/pipermail/scip/attachments/20141031/0ee95cfb/attachment.html>