 this object. To obtain the solutions of this
 goal, the <A HREF="../CiaoJava/PLGoal.html#nextSolution()"><CODE>nextSolution()</CODE></A> method must be called, once for
 each solution.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><code>IOException</code>,</CODE> - <code>PLException</code>
            if there is any problem 
            communicating with the Prolog process, or in the
            Prolog side (e.g., the predicate to be launched
            does not exist, or the goal has been launched yet).
<