Originally posted by: Cplex

Hey guys,

I have to solve my model (maximize the obejctive) several times. I habe to run several scenarios.

My problem looks more or less like that:

forall (k in K) {

     z[k] == 0;

            forall (l in K| l > k) {

                     z[l] == 0;

                        solve model

                           z[l] == 1;                                                   (after solving the model, before solving the model for the next k)

                           z[k] == 1; }}                                          

I'm not sure how to implement that in ILOG.

How can I do solve the model inside such a loop several times? Maybe I have to put any formulation like "solve model" inside a main block?

Thanks in advance!

Originally posted by: Cplex

Is there nobody who is able to help me??
 

Originally posted by: Cplex

Now I tried it in a main block as follows:

main {
 
  var K = 92;
 
   var sum = 0.0;
   
   
     // Create the model and solve it
     var cplex = new IloCplex();
     var source = new IloOplModelSource("KH 3.mod");
     var def = new IloOplModelDefinition(source);
     var opl = new IloOplModel(def, cplex);
     var data = new IloOplDataSource("KH 3.dat");
     opl.addDataSource(data);
     opl.generate();
     for(var k in 1..K){
       for(var l in 1..K| l > k){
             for(var n in 1..K| n >l){
               z[k] == 0;
               z[l] == 0;
               z[n] == 0;
               cplex.solve();
               if (cplex.solve()) {
                 writeln("OBJ = " + cplex.getObjValue());
               } else {
                 writeln("No solution");
             }}}}
   
     
     // Cleanup
     opl.end();
     data.end();
     def.end();
     source.end();
     cplex.end();
}

The model runs but then says that there's no solution. I attached both my model and my data file as well as the model file containing the main block.

I really need some help in this case.

Thanks!