I'm implementing a two-phase method in CPLEX OPL.
I would like to create a set containing the unitary values of a variable obtained during my initial phase. In order to initialize my second phase, I make a getValue(X) to recover the optimal values for that boolean variable indexed in i,j,k. Later, inside a double loop on indices "j" and "k" I try to declare the set "S" of the unitary values of "X" along the i-dimension.
However, I fail to make a proper set declaration... I've already tried using:
var S = {i | i in I : X[i][j][k] == 1};
int S = {i | i in I : X[i][j][k] == 1};
{int} S = {i | i in I : X[i][j][k] == 1};
But I always get the error: "Illegal use of a reserved keyword". I know that my set declaration isn't good but have no idea of how to declare it in order to have my set S containing the values of I for which X[i][j][k] == 1.
Could you please provide some help? Best regards
