Originally posted by: Amay_mei

hi all,

I have construct a model in Ilog cplex opl, and it works. 

In the model file, there are some variables which are used for calculating some data, and all these data calculated have nothing to do with objective and constraints.

The results show that these variables are not computed by the model at all. and the result of all these variable are not listed in the problem browsers.

I don't know how to deal with this problem? 

the model is based on a large-scale problem, and the result of decision variables are huge, I do not want to copy the solution results of all decision variables to the data file, and recalculate them again.

Could you help me please?

Thank you so much.

Amay

There is a separate forum dedicated to OPL here. Please post your question there.

Hi

you should use the OPL setting

Force element usage

regards

PS:

let me give you an example

dvar int x[1..2] in 1..2;
dvar int y in 1..3;

subject to
{
x[1]==2;
}

by default this gives

x = [2
         1];

if you set force usage the you get

x = [2
         1];
y = 1;

regards