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## Re: [Help-glpk] [Fwd: MathProg to Cplex problem]

**From**: |
Andrew Makhorin |

**Subject**: |
Re: [Help-glpk] [Fwd: MathProg to Cplex problem] |

**Date**: |
Tue, 08 Apr 2014 17:40:29 +0400 |

>* I'm a new user of both Cplex and Glpsol, and i'm currently facing a*
>* strange problem which you guys might know how to go through. I want to*
>* convert a MathProg file into cplex formulation so that i can solve it*
>* faster.*
>* *
>* I use the simple command : glpsol -m model.mod -d data.dat --check*
>* --wcpxlp model.lp which works fine.*
>* *
>* The problem is that in model.lp, my binary variables from model.mod are*
>* not defined as binary variables but with bounds such that : 0 <= x(1,1)*
>* <= 1 and as Generals x(1,1).*
A general integer variable with lower bound 0 and upper bound 1 is a
binary variable, so there should be no problem.
>* *
>* My question is : Is there a way to automatically convert integer variables*
>* from model.mod into BINARY variables in model.lp ? Indeed, i could remove*
>* the bounds and define the variables as BINARY and not Generals but i would*
>* have a lot of manipulations to do as i've got lots of benchs*
No conversion is needed.
>* *
>* More over, i get the feeling that this would make my PLNE easier to solve.*
>* *