[Scip] Solving a MINLP in SCIP

[Marc Pfetsch]

Hi Apurv,

SCIP currently only allows linear relaxations (i.e. LPs). The solution
of convex relaxation is not (yet) supported.

IPOPT is only used to solve NLPs within heuristics and you should see a
message of IPOPT if this happens for the first time.

Best

Marc



On 24/06/15 14:50, Apurv Shukla wrote:
> Hello
> I need to solve a MINLP problem using SCIP (using Ipopt for nonlinear
> part). I have implemented the model in SCIP using expression trees and
> nonlinear constraint handlers. Then I call scipsolve to solve the model.
> However I think that SCIP is unable to use Ipopt for solving the
> nonlinear program generated at each branching node. I have checked the
> availability of Ipopt to SCIP using SCIPisIpoptAvailableIpopt. For help
> I am using the same procedure as in the example string
> (http://scip.zib.de/doc/examples/CallableLibrary/string_8c_source.php).
> How can I make sure that SCIP uses Ipopt to solve the nonlinear program
> generated at each node?
> Regards
>    
> Apurv Shukla 
> Third Year Undergraduate Student
> Department of Mechanical Engineering 
> IIT Kharagpur
> 
> 
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