[Scip] How to find out which constraints were active during the solving process

[Rostislav Stanek]

Dear SCIP community,

I have the following problem: I would like to find out which constraints 
were active during the solving process and which did not at all.

Thus I defined an event handler and set the events 
SCIP_EVENTTYPE_FIRSTLPSOLVED and SCIP_EVENTTYPE_LPSOLVED and 
SCIP_EVENTTYPE_NODESOLVED.

Then I call SCIPconsIsActive(constraint) in the method 
SCIP_DECL_EVENTEXEC(EventHandlerLPSolved::scip_exec) and always obtain 
false. (I have references to all constraints (std::vector<SCIP_CONS *> 
&constraints;) in the class).

Am I doing something wrong? Is it possible to get out all constraints 
used during the solving process?

Thank you very much for all hints and tips.

Yours faithfully
Rostislav Stanek