Hi,
I have started using GAMS EMP and I am running into a problem controlling the subsolver through the emp.opt file.I would appreciate it if you could help me through this.
I am using the sequence.gms example provided in EMPLib. When I globally set the MIP solver to either Cplex or SCIP these solvers get invoked (and solve the problem) in every reformulation despite specifying the alternate solver as a subsolver.
As below in sequence.lst we have lines indicating setting the subsolver to Cplex and later we see that SCIP is envoked which is my default MIP solver.
— Using Option File
Reading parameter(s) from “D:\vSPDv2.0.4\Programs\jams.opt”
FileName indicators.gms
SubSolver CPLEX
Finished reading from “D:\vSPDv2.0.4\Programs\jams.opt”
…
JAMS : indicators.gms
— The model indicators.gms will be solved by GAMS
— Returning from GAMS step
SCIP 24.3.3 r48116 Released Sep 19, 2014 VS8 x86 32bit/MS Windows
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Hi,
Thanks for pointing this out: we’ve fixed the issue in the JAMS source. This will be reflected in the public beta of our next major release due out near the end of August.
-Steve
On Mon, Aug 10, 2015 at 11:30 PM, M Habibian wrote:
Hi,
I have started using GAMS EMP and I am running into a problem controlling the subsolver through the emp.opt file.I would appreciate it if you could help me through this.
I am using the sequence.gms example provided in EMPLib. When I globally set the MIP solver to either Cplex or SCIP these solvers get invoked (and solve the problem) in every reformulation despite specifying the alternate solver as a subsolver.
As below in sequence.lst we have lines indicating setting the subsolver to Cplex and later we see that SCIP is envoked which is my default MIP solver.
— Using Option File
Reading parameter(s) from “D:\vSPDv2.0.4\Programs\jams.opt”
FileName indicators.gms
SubSolver CPLEX
Finished reading from “D:\vSPDv2.0.4\Programs\jams.opt”
…
JAMS : indicators.gms
— The model indicators.gms will be solved by GAMS
— Returning from GAMS step
SCIP 24.3.3 r48116 Released Sep 19, 2014 VS8 x86 32bit/MS Windows
Steven Dirkse, Ph.D.
GAMS Development Corp., Washington DC
Voice: (202)342-0180 Fax: (202)342-0181
sdirkse@gams.com
http://www.gams.com