read_data problem

Hi lammps user, I have a problem with read_data command, This is the message
"
LAMMPS (7 Dec 2010)
# This script builds a B2 structure for Cu60Zr40 force field eam/fs

# ---------- Initialize Simulation ---------------------
clear
units metal
boundary p p p
atom_style atomic

# ---------- date file ---------------------------------
read_data data.Cu60Zr40
ERROR: Unknown identifier in data file: 0.000 32.500 xlo xhi
"
I don't understand beacuse is this

"
Start file metal bond Cu60Zr40

2000 atoms

2 atom types

0.000 32.500 xlo xhi
0.000 32.500 ylo yhi
0.000 32.500 zlo zhi

Atoms

1 1 0.000000 0.000000 0.000000
2 2 1.625000 1.625000 1.625000
3 1 3.250000 0.000000 0.000000
4 2 4.875000 1.625000 1.625000
5 1 6.500000 0.000000 0.000000
6 2 8.125000 1.625000 1.625000

in.Cu60Zr40 (1.06 KB)

data.Cu60Zr40 (71.2 KB)

log.lammps (370 Bytes)

CuZr_mm.eam.fs (2.16 MB)

The keyword it is looking for is "xlo xhi" with a single space.

Steve