This is likely due do the fact that "W" stands for the width of the square lattice (which has to be an integer), I suppose, and that therefore you'd better not use this name in this model ...

Le 3 nov. 10 à 13:48, Emanuele Dalla Torre a écrit :

Dear ALPS,

thank you for existing!

I found something that looks like a bug. I use the worm algorithm (Windows XP) with the following parameter file. When I run the code, it exits without giving any detail. If I change the letter W with any other letter it works.

LATTICE="square lattice";
L=4;
MODEL_LIBRARY="pairedBEC.model.xml"
MODEL="boson Hubbard";
NONLOCAL=0;
V    = 1.0;
W    = 0.1;
mu   = 0.5;
Nmax = 2;
T = 0.1;
SWEEPS=500000;
THERMALIZATION=10000;
{ t=0.01; }