Example in distribution does not work

[Dave Ellacott]

Hi,

  I have installed gnu-prolog 1.3.0 on my system (Linux 2.6.21.7, running
GCC 4.2.2) and was trying out the example in section 9.5.1 of the manual
("asking for ancestors"). It works fine interactively with gprolog, but
when compiled in accordance with the instructions, it only ever returns
the first solution to the queries (i.e. nb_sol is never more than 1).

Regards,
Dave Ellacott