error in defining lattice

hello dear

i want to simulate water and nano fluid cu in a fcc lattice…water is base fluid and cu is a region (sphere or box)in the center of lattice (between water)

molecules are in the range of 1000 to 1500 and cu atoms are about 400 to 500

when it runs it shows this error"illegal lattice command"

does anybody know how to define lattice command of sphere…

Atom Definition

Water

read_data water.data

group hydrogen type 1

group Water type 1 2

group cu type 3

group oxygen type 2

Cu

lattice fcc 3. 610

region Cu sphere 0 0 0 7 units box #radius of sphere is 7

create_atoms 3 region Cu

set group oxygen charge -1.040

set group hydrogen charge .520

set group cu charge 0.000

hello dear

i want to simulate water and nano fluid cu in a fcc lattice...water is base
fluid and cu is a region (sphere or box)in the center of lattice (between
water)

molecules are in the range of 1000 to 1500 and cu atoms are about 400 to 500

when it runs it shows this error"illegal lattice command"

does anybody know how to define lattice command of sphere...

yes, but do *you* know how to compare your input to the documentation
to verify that everything is correct?