Hi,Thanks, looks like I didn't notice when this was reported before.
I think there's a small problem with the semantic predicate of the range rule:
range :a :b =
anything:x ?[a <= x & x <= b] -> [x]
A pair of parenthesis fixes the problem:
range :a :b =
anything:x ?[a <= x & (x <= b)] -> [x]
Thanks,Doug