Originally posted by: SystemAdmin

[elham said:]

Hello,
I am very new to ILOG and I appreciate your help.

in my cp model, I have a set of optional tasks (intervals). and I want to write a script to select a possible combination of tasks for execution each time. in other words I want to write a script that in a for loop it can add the constraints of (presence of particular tasks) to the model and solve the model.
#DecisionOptimization
#OPLusingCPOptimizer

Originally posted by: SystemAdmin

[afleischer said:]

Hi,

to do that I think you could use a main block and change the LB of the presence you want to set.

For example

using CP;

dvar boolean p[1..10];
dvar interval act[1..10] optional in 0..10;

minimize sum(a in 1..10) presenceOf(act[a]);
subject to
{
forall(a in 1..10) p[a]==presenceOf(act[a]);
}

execute
{
writeln(p);
}

main
{
thisOplModel.generate();
for(var a=1;a<=10;a++)<br />{
thisOplModel.p[a].LB=1;
cp.solve();
thisOplModel.postProcess();
thisOplModel.p[a].LB=0;
}

gives

[1 0 0 0 0 0 0 0 0 0]
[0 1 0 0 0 0 0 0 0 0]
[0 0 1 0 0 0 0 0 0 0]
[0 0 0 1 0 0 0 0 0 0]
[0 0 0 0 1 0 0 0 0 0]
[0 0 0 0 0 1 0 0 0 0]
[0 0 0 0 0 0 1 0 0 0]
[0 0 0 0 0 0 0 1 0 0]
[0 0 0 0 0 0 0 0 1 0]
[0 0 0 0 0 0 0 0 0 1]


Alex


#DecisionOptimization
#OPLusingCPOptimizer