hello.

the code i wrote is below i have mistakes error 149,409,140,812 it is a transport model problem i'm a student and i'm trying to learn GAMS how can i fix that? please contact me if you think i have another fault

sets

i truck type /1,2,3/

j dealer/1*8/;

parameters

m(i) 'i the cost of carrying 1 ton of cement carried by the truck '

/1 0.0353

2 0.0432

3 0.0520/

y(j) 'distance between factory and dealer '

/1 370

2 592

3 156

4 60

5 110

6 160

7 330

8 444/

t(j) 'amount of demand '

/ 1 4936

2 4126

3 2428

4 7497

5 5920

6 5748

7 1470

8 3490/

a(i) 'load capacity of the truck i '

/1 24

2 16

3 10/;

;

variables

z

x(i,j) 'the nuber of trips the truck i will make to its dealer '

;

equations

cost

restriction1 'prevents the amount of cement from exceeding the demand'

restriction2 'prevents the load carried by the 24 ton truck from exceeding the dealer'demand j '

restriction3 'prevents the load carried by the 16 ton truck from exceeding the dealer'demand j '

restriction4 'prevents the load carried by the 10 ton truck from exceeding the dealer'demand j '

restriction5 ;

cost.. z=e=sum((i,j),[m(i)*x(i,j)]*y(j)) ;

restriction1.. (24*x(i,j))+(16*x(i,j))+(10*x(i,j)) =e= t(j) ; * error 149,409 409 Unrecognizable item - skip to find a new statement

**** looking for a ';' or a key word to get started again

restriction2x(i,j).. 24*x(i,j)=l= t(j); *error 140

restriction3x(i,j).. 16*x(i,j)=l= t(j); *error 140

restriction4x(i,j).. 10*x(i,j)=l= t(j); *error 140

restriction5x(i,j).. x(i,j)=g=0;

model number of trips /all/;

solve number of trips using mip minimizing z; *error 812

## transport modell with gams Topic is solved

### Re: transport modell with gams

In the following constraint

restriction1.. (24*x(i,j))+(16*x(i,j))+(10*x(i,j)) =e= t(j) ;

The model does not know what is i and j

you have to define restriction1(i, j)

Hope this helps.

- Atharv

restriction1.. (24*x(i,j))+(16*x(i,j))+(10*x(i,j)) =e= t(j) ;

The model does not know what is i and j

you have to define restriction1(i, j)

Hope this helps.

- Atharv

### Re: transport modell with gams

Thank you so much I fixed the problem