Hi,
Does anybody know how to convert the Gams file to *.mpi or *.mps? I have already studied the given information in this webpage: https://www.gams.com/latest/docs/solvers/convert/index.html, but I found the information very confusing. I would be appreciate if anybody could provide me with some clear information about converting Gams files.

Sets
i canning plants / seattle, san-diego /
j markets / new-york, chicago, topeka / ;
Parameters
a(i) capacity of plant i in cases
/ seattle 350
san-diego 600 /
b(j) demand at market j in cases
/ new-york 325
chicago 300
topeka 275 / ;
Table d(i,j) distance in thousands of miles
new-york chicago topeka
seattle 2.5 1.7 1.8
san-diego 2.5 1.8 1.4 ;
Scalar f freight in dollars per case per thousand miles /90/ ;
Parameter c(i,j) transport cost in thousands of dollars per case ;
c(i,j) = f * d(i,j) / 1000 ;
Variables
x(i,j) shipment quantities in cases
z total transportation costs in thousands of dollars ;
Positive Variable x ;
Equations
cost define objective function
supply(i) observe supply limit at plant i
demand(j) satisfy demand at market j ;
cost .. z =e= sum((i,j), c(i,j)*x(i,j)) ;
supply(i) .. sum(j, x(i,j)) =l= a(i) ;
demand(j) .. sum(i, x(i,j)) =g= b(j) ;
Model transport /all/ ;
*** Modifications
* choose convert as solver
option lp = convert;
* write convert option file
$echo fixedMPS transport.mps > convert.opt
* instruct convert to look for a solver option file
transport.optfile = 1;
Solve transport using lp minimizing z ;

Thank you yanzhiping!
Would you please let me know more about “cplex.o98” and “transport.optfile = 98”? Why we need to have “98” and “o98” instead of “1” and “opt”?

Could someone please assist me in converting a gams file to JuMP .jl format? I had used the solution answer as a guideline but it is not working. It is giving the error that JuMP is unknown yet gams convert tool does allow for conversion to this format.

Your assistance will be highly appreciated

Grace

Model transport / all /;

**modifications
option lp=convert;
$echo jump transport.jl > convert.opt
transport.optfile = 1;
solve transport using lp minimizing z;