Originally posted by: DieterVangheel

Dear,

In our model we have the following two constraints:

For all j and k: ∑_(i=1) till 457 Xi,j,k ≤ Bj * Yj,k
For all j and k: ∑_(i=458) till 895 Xi,j,k ≤ Bj * (1-Yj,k)

We have written this in cplex as follow. Is this correct (we think it will not work like this in cplex :s )?
forall(j in kamers)
forall( k in dagen)
sum (i in personen from 1 till 457)x[i][j][k]<=b[j]*y[j][k]

forall(j in kamers)
forall( k in dagen)
sum(i in personen from 457 till 895)x[i][j][k]<=b[j]*(1-y[j][k])
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

It seems that this is an OPL syntax question. You may have better luck in getting an answer if you repost this to the OPL forum.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

As Tobias suggests, please post your OPL related questions in the OPL forum as to reach the appropriate folks.

With regards to your constraints, you could do something like the following to make it work:

forall(j in kamers)
       forall( k in dagen)
         sum (i in personen:i>=1 && i<=457) x[i][j][k]<=b[j]*y[j][k];
        
     forall(j in kamers)
       forall( k in dagen)
         sum(i in personen: i>=458 && i<=895) x[i][j][k]<=b[j]*(1-y[j][k]);

#CPLEXOptimizers
#DecisionOptimization