error" out of range of atom.cannot compute pppm"

hello dear
i have simulated water and cu.when it runs it shows this error"out of range of atom.cannot compute pppm".
input code and data have been attached

i appreciate any help.thanks

units real
dimension 3
boundary p p p

atom_style full
bond_style harmonic
angle_style harmonic
kspace_style pppm 1.0e-5

#----------------->> Water


group hydrogen type 1
group Water type 1 2
group cu type 3
group oxygen type 2


lattice fcc " 3. 615" #Cu lattice constant
region Cu sphere 0 0 0 7 units box
create_atoms 3 region Cu