Originally posted by: Nazanin Esmaili

Hi,

I want to define a decision variable which has 4 index but one on these indexes has different range for example:

dvar boolean x[0..w-1][0..h-1][1][1..3];

dvar boolean x[0..w-1][0..h-1][2][1..2];

dvar boolean x[0..w-1][0..h-1][3][1];

when I defined x such the above, the system gave me an error for the second line that I have already defined x. I appreciate any help. Thanks.

Nazanin

Please ask this question on the OPL Forum.

Hi,

you could either declare 3 arrays x1,x2 and x3

or have a array indexed by tuples with 4 components:

tuple t

{

int c1;

int c2;

int c3;

int c4;

}

then you define {t} s= ... ;

and finally dvar boolean x[s];

regards