I'm using tuProlog to integrate Prolog with Java, to do so I'v been defined a .pl file wich contains this code:

go:-write('hello world!'),nl.

In my Java File at NetBeans i Have a Main Class that invokes this:

Prolog engine = new Prolog();

Theory theory = new Theory(new FileInputStream("facultad.pl"));

try { engine.setTheory(theory); } catch (InvalidTheoryException ex) {

   }

SolveInfo solution = engine.solve("go.");

if (solution.isSuccess()) {

System.out.println(solution.getSolution());

}

This Code must returns 'hello world', but instead of that it answer 'go', any ideas about this erratic behavior ??