This version of ham_path/3 uses the native Gecode indexing, which starts from 0. This is different from normal ECLiPSe's indexing, which starts from 1, and may be incompatible with existing ECLiPSe code.
See ham_path/3 for a more detailed description of this predicate.
[eclipse 6]: ham_path_g(S,E,[A,B]). S = S{[0, 1]} E = E{[0, 1]} A = A{[1, 2]} B = B{[0, 2]} [eclipse 7]: ham_path_g(1,0,[A,B]). A = 2 B = 0 [eclipse 8]: ham_path_g(S,E,[1,3,0]). S = 2 E = 1