[lammps-users] Invalid args for pair coefficients'

I am a new user of lammps I got a error of invalid args for pair coefficients

---------- Initialize Simulation -----------------

clear
units metal
boundary p p p
atom_style atomic

#--------------- Create Atoms--------------
region box block 0 50 0 50 0 50
create_box 3 box

lattice fcc 3.597 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1
region upbox block 0 32 27 50 0 14
create_atoms 1 region upbox

lattice fcc 3.567 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1
region par sphere 15 25 15 1.5
create_atoms 2 region par

lattice fcc 3.597 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1
region dobox block 0 32 0 23 0 14
create_atoms 3 region dobox

#-----------Define Interatomic Potentials------------------
pair_style hybrid eam morse 8.5
pair_coeff 1 1 eam D:/Potentials/Cu_u3.eam null Cu
pair_coeff 3 3 eam D:/Potentials/Cu_u3.eam null Cu
pair_coeff 2 2 2.43
pair_coeff 1 2 morse 0.01 0.01
pair_coeff 2 3 morse 0.01 0.01

neighbor 0.3 bin
neigh_modify delay 5

#---------------Define settings-----------------------
compute csym all centro/atom
compute peratom all pe/atom

#-----------------Run Minimization---------------
reset_timestep 0
thermo 100
thermo_style custom step temp pe lx ly lz press pxx pyy pzz
min_style cg
minimize 1e-25 1e-25 5000 10000

#############Minimization Finish--------------------

---------- EQUILIBRATION -------------------------

reset_timestep 0
timestep 0.001

fix 1 all npt temp 300 300 1 iso 0 0 1 drag 1

run 2000
unfix 1

Store final cell length for strain calculations

variable tmp equal “lx”
variable L0 equal {tmp} print "Initial Length, L0: {L0}"

#----------------DEFORMATION---------------------------------
reset_timestep 0
fix 1 all npt temp 300 300 1 y 0 0 1 z 0 0 1 drag 1
variable srate equal 1.0e10
variable srate1 equal “-v_srate / 1.0e12”
fix 2 all deform 1 x erate ${srate1} units box remap x

variable strain equal “(lx - v_L0)/v_L0”
variable p1 equal “v_strain”
variable p2 equal “-pxx/10000”
variable p3 equal “-pyy/10000”
variable p4 equal “-pzz/10000”

dump 1 all custom 250 dump.ellip.comp.* id xs ys zs c_csym c_peratom fx fy fz

run 2000

So you need to correct it. LAMMPS will tell you which is the failing line, so all that is left is checking with the documentation how.
Axel.

pair_coeff 1 1 eam D:/Potentials/Cu_u3.eam null Cu

This line I am getting error

Yes. It is incorrect. See the docs for the eam (and not eam/fs or eam/alloy which are in the same file).