Originally posted by: 88Simon88

Hello everybody,

I am running a model which takes hours to find the optimal solution. Now I have two questions:

1- How can I impose a gap limit or time limit for termination of the algorithm? For example, I want to know the best integer solution within 1 hour? or stop solving the problem if the gap is less than 1%?

2- How can I store or print the best integer solution within the termination limit? 

I deeply appreciate you if you could explain them to me with an example code.

Hi

1)

You could try

execute
{
cplex.tilim=3600;
cplex.epgap=0.01;
}

2)

You can do that through writeln in postprocess

See https://www.linkedin.com/pulse/making-decision-optimization-simple-alex-fleischer/

regards

Originally posted by: 88Simon88

Thanks for your reply.

For the second question, I have two choices:

1) write code in post process, like:

 execute DISPLAY_OBJ
{
    writeln("Optimal objective value="+cplex.getObjValue())
}

2) write code in scripting log, like 

write(X)
write(cplex.getObjValue())
var ofile = new IloOplOutputFile("modelRun.txt");
ofile.writeln("Optimal objective value="+cplex.getObjValue())
ofile.writeln(X)
ofile.close();

put me right if I am wrong?