[SCIP] Why the branch rule callback is never called?

[Gerald Gamrath]

Dear William,

I just checked the binpacking example with SCIP 5.0 and the smallest 
test instance u20_00 is indeed solved without any branching. But the 
second-smalles already requires some branching and the Ryan Foster 
branching rule is called a few times:
> Branching Rules    :   ExecTime SetupTime   BranchLP  BranchExt   
> BranchPS    Cutoffs DomReds       Cuts      Conss   Children
>   RyanFoster       :       0.00       0.00 5          0          
> 0          0          0 0          0         10

In your case, is any branching done? If so, which branching rule is 
used? Did you implement both the branchexeclp and the branchexecps 
callback? And is the priority of your branching rule higher than of all 
other rules?

Best,
Gerald

On 27.12.2017 08:31, Jianan Zhang wrote:
> Hi all,
> I am using branch and price method to deal with a problem and using 
> SCIP solver. While I found my Ryan Forster branching rule callback 
> method is never called by scip framework. My code is following the 
> [binpacking] example, and i found that the ryan-forster branch rule 
> callback in the [binpacking] example is not called either. Can you 
> confirm that?
> Thanks for you help.
> William
>
>
>
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