## gams error

Problems with syntax of GAMS
alpzhan7
User
Posts: 4
Joined: 2 months ago

### gams error

sets
i unsweetened coke /1*5/
j sweetened coke /1*5/;

parameter
demand (j) demand for coke
/ 1 1000
2 1500
3 1250
4 1600
5 1350/;

parameter
rmCaffeine (i) Caffeine ratio of type I raw material
/ 1 24
2 12
3 16
4 20
5 28/;

parameter
rmAcesulfamePotassium (i) Acesulfame Potassium ratio of type I raw material
/ 1 2
2 4
3 6
4 8
5 10/;

parameter
rmCost (i) Purchase price of raw material type I
/ 1 2
2 3
3 4
4 5
5 6/;

parameter
Caffein (j) Caffeine grade of type j cola
/ 1 70
2 80
3 60
4 75
5 74/;

parameter
AcesulfamePotassium (j) Acesulfame Potassium grade of type j cola
/ 1 20
2 25
3 15
4 12
5 8/;

parameter
Salescost (j) Sale price of type j cola.
/ 1 3
2 6
3 9
4 12
5 15/;

positive variable x(i,j);
* i. unsweetened coke j. sweetened coke
positive variable r(j);
* j. marketing coke
variable z;
* total profit
scalar f/20/;
*\$1 ad increases demand by 20 units

equations
profit function
supply(j) the constraint established on meeting the demand
Caffein(j) caffeine restriction
AcesulfamePotassium(j) acesulfame potassium restriction;

profit.. z=e=sum((i,j), Salescost(j)*x(i,j))-sum(i,j), ((rmCost(i)*x(i,j)-r(j))));
supply(j).. sum((i), (x(i,j))) :=1= (demand(j)+(f*r(j)));
Caffein(j).. sum((i), (Caffein(j)*x(i,j))) :=1= sum((i), (rmCaffein(i)*x(i,j)));
AcesulfamePotassium(j).. sum((i), (AcesulfamePotassium(j)*x(i,j))) =1= sum((i), (rmAcesulfamePotassium(i)*x(i,j)));

model newcoke /all/;
solve newcoke using lp maximizing z;
Display Z.L , X.L;

How can I fix errors?? help me please

abhosekar
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Posts: 190
Joined: 10 months ago