[SCIP] error in Julia interface

[Yankai Cao]

Hi, Ambros, 

 

Here is the test code of Julia:

using JuMP, SCIP

m=Model()


@variable(m, -10<= x <=10, start=1)

@variable(m, -100<= y <=100, start=1)

@NLconstraint(m, x^2 + y^2 == 10)

@NLobjective(m, Min, x*y)

 m.solver = SCIPSolver()


status = solve(m)

 

I installed scipoptsuite-4.0.0 first and then install Julia interface with Pkg.add(“SCIP”). 

 

The error happened because in /JuMP/src/nlp.jl:1259

	if applicable(MathProgBase.getconstrduals, m.internalModel) && applicable(MathProgBase.getreducedcosts, m.internalModel)

            nlduals = MathProgBase.getconstrduals(m.internalModel)

 and in .julia/v0.4/SCIP/src/mpb_interface.jl:209


 	getconstrduals(m::SCIPMathProgModel) = error("Not implemented for SCIP.jl")


 

The error disappear when I comment out line 209 of mob_interface.jl or replace 

 @NLconstraint(m, x^2 + y^2 == 10)


@NLobjective(m, Min, x*y)

 to 


@constraint(m, x^2 + y^2 == 10)

@objective(m, Min, x*y)



Regards,
Yankai


> On Apr 12, 2017, at 2:05 AM, Ambros Gleixner <gleixner at zib.de> wrote:
> 
> Hi Yankai,
> 
> We will need some more information from your side to help.  Can you send your Julia code and describe in more detail your setup?
> 
> Best,
> Ambros
> 
> 
> On 10.04.2017 22:36, Yankai Cao wrote:
>> HI, I am using SCIP 4.0 with Julia. SCIP can solve my problem to global
>> optimality. But I got the following error. Is there anyway to remove this?
>> 
>> 
>> Regards,
>> Yankai
>> SCIP Status        : problem is solved [optimal solution found]
>> Solving Time (sec) : 0.07
>> Solving Nodes      : 98
>> Primal Bound       : +7.94432584076847e-01 (5 solutions)
>> Dual Bound         : +7.94432584076847e-01
>> Gap                : 0.00 %
>> ERROR: LoadError: Not implemented for SCIP.jl
>> in getconstrduals at /home/cao27/.julia/v0.4/SCIP/src/mpb_interface.jl:209
>> in solvenlp at /home/cao27/.julia/v0.4/JuMP/src/nlp.jl:1259
>> in solve at /home/cao27/.julia/v0.4/JuMP/src/solvers.jl:138
>> in include at ./boot.jl:261
>> in include_from_node1 at ./loading.jl:320
>> in process_options at ./client.jl:280
>> in _start at ./client.jl:378
>> 
>> 
>> _______________________________________________
>> Scip mailing list
>> Scip at zib.de
>> https://listserv.zib.de/mailman/listinfo/scip
>> 
> 
> -- 
> Ambros Gleixner, Zuse Institute Berlin, http://www.zib.de/gleixner
> _______________________________________________
> Scip mailing list
> Scip at zib.de
> https://listserv.zib.de/mailman/listinfo/scip

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.zib.de/pipermail/scip/attachments/20170412/70676d35/attachment.html>