I'm trying to make i is not equal to j

GAMS
1

This is a minimization problem, but when I enter some constraints, i1 takes the values ​​j1, i2, j2 in the table value and my result is 0. How can I add a constraint so that i is not equal to j?

sets
i /14/
j / 14/
table
0 1 2 3 4
0 0 114 86 7 17
1 114 0 72 39 75
2 86 72 0 65 63
3 7 39 65 0 83
4 17 75 63 83 0
binary variables
x(i,j)
Equations

object
equ1

object…z=e=sum ((i,j),T(i,j)*X(i,j));

model TEZ /all/
solve TEZ minlp minimizing z

2

Hi, you can try this.
object… z =e= sum ((i,j)$(not sameas(i,j)),T(i,j)*X(i,j));

I see other errors in the code, but this must be only part of the problem
bye!