lib(ic)

Version 5.2 #7, Thu Jun 14 02:14 2001
[eclipse 1]: [user].

 :- lib(ic).

 p(Costs) :-
        X #= sum(Costs).

 instantiation fault in _352 is sum(Costs)
syntax error : in source transformation in p(Costs) :- X #= sum(Costs)
 ^D
No (0.42s cpu)