Description
Small Model of Type : GAMS
Category : GAMS Test library
Main file : savep1.gms
$title execute_loadpoint: save point - clear - loadpoint - reoptimize (SAVEP1,SEQ=65)
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/ ;
$onEchoV > sptest.gms
transport.savepoint=%1;
option lp=soplex,limrow=0,limcol=0;
x.up(i,j) = 300;
transport.number = 0;
Solve transport using lp minimizing z ;
option clear=z,clear=cost,clear=supply,clear=demand; x.l(i,j) = 0; x.m(i,j) = 0;
execute_loadpoint '%2';
transport.savepoint=0;
Solve transport using lp minimizing z ;
abort$(transport.solvestat <> %solveStat.normalCompletion% or
transport.modelstat <> %modelStat.optimal% or
transport.iterusd <> 0 ) 'something really wrong';
$offEcho
$batInclude sptest 1 'transport_p.gdx'
$batInclude sptest 2 'transport_p1.gdx'
$batInclude sptest 3 '%gams.scrdir%transport_p.gdx'
$batInclude sptest 4 '%gams.scrdir%transport_p1.gdx'
execute.checkErrorLevel 'rm "%gams.scrdir%transport_p.gdx"';
execute.checkErrorLevel 'rm "%gams.scrdir%transport_p1.gdx"';