Max of list with constrained variables

"Georgios Samaras" <[email protected]>
Newsgroups gmane.comp.gnu.prolog.general
Message-ID <[email protected]>
I have a list, which, for N = 5 (for instance), it is like this:
[3*(1-_#0(0..1)),2*(1-_#18(0..1)),1*(1-_#36(0..1)),4*(1-_#54(0..1)),2*(1-_#72(0..1))].

I am working on a finite domain constraint environment and I tried this
max_list(MaxFilter, M0),

and I got this error (since the variable does not have a value at this
moment)
uncaught exception: error(type_error(evaluable,_#4195373(0..1)),(=<)/2)

In Eclipse, I would use eval and in SWI, I used this predicate
lmax([H|T], X):-
	foldl(max_, T, H, Exp),
	X #= Exp.
max_(E, X, max(E, X)).

but I did not find any equiivalent of foldl in GNU.

What should I do? Any ideas? I am stuck and I have been searching the
whole internet for days...

//G. Samaras
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