[ALPS-users] worm and dirloop_sse for Bose-Hubbard model

Dear ALPS users For the extended Bose-Hubbard H = -t\sum_{<i,j>} a^{\dagger}_i a_j +\frac{U}{2}\sum_{i}n_i(n_i-1) + V\sum_{<i,j>}n_in_j -\mu\sum_{i}n_i, I wonder why worm and dirloop_sse in ALPS show two completely different results? Another technique problem as follows. Can one change parameters Nmax = 2 or NONLOCAL = 0 in the tutorial? I am not sure what's the impact of these two parameters. Any help will be greatly appreciated. THANKS! Sincerely, Fu-Jiun