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