error in illegal compute stress/atom command

hello dear users
i want to simulate water-cu.and compute viscosity and thermal conductivity.thid is is my input code.i have got the code from shows this error "error in illegal compute stress/atom command ".does anybody know about this error.
thankyou very much

variable T equal 298
variable V equal vol
variable dt equal .00001

variable x equal 23.41
variable y equal 23.41

variable rho equal 0.6
variable t equal 0.0002
variable rc equal 2.5

variable p equal 200 # correlation length
variable s equal 3 # sample interval
variable d equal $p*$s # dump interval

convert from LAMMPS real units to SI

variable kB equal 1.3806504e-23 # [J/K] Boltzmann
variable kCal2J equal 4186.0/6.02214e23
variable atm2Pa equal 101325.0
variable A2m equal 1.0e-10
variable fs2s equal 1.0e-15
variable convert equal {kCal2J}*{kCal2J}/{fs2s}/{A2m} #thermal conductivity
variable convert equal {atm2Pa}*{atm2Pa}{fs2s}*{A2m}{A2m}*{A2m}
#set up problem

dimension 3
echo screen
boundary p p p

atom_style full
bond_style harmonic #hybrid harmonic
angle_style harmonic #hybrid harmonic
kspace_style pppm 1.0e-4

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 3 units box
create_atoms 3 region Cu

pair_style hybrid lj/cut/coul/long 0.1521 3.157 eam lj/cut .583 #2.8 # 3.157 # 7.5
pair_coeff 1 1 lj/cut/coul/long 0.0460 0.4000 #H-H epsilon sigm # 108.0e-21 32.0e-11
pair_coeff 1 2 lj/cut/coul/long 0.0836 1.7753 #O-H epsilon sigma
pair_coeff 1 3 lj/cut 0.6589 0.2117 #H-Cu epsilon sigma
pair_coeff 2 2 lj/cut/coul/long 0.1521 3.157 #O-O epsilon sigma # 0 0
pair_coeff 2 3 lj/cut 1.198 1.587 #O-Cu epsilon sigma
pair_coeff 3 3 eam cu.eam #Cu-Cu

bond_coeff 1 450 0.9572 #O-H
angle_coeff 1 55 104.52 #H-O-H


neighbor 2.0 bin
neigh_modify delay 0 every 1 check yes

min_modify dmax 0.01
minimize 1.0e-8 0 100000 300000

timestep 0.000002
thermo $d

velocity all create 298 4928459 rot yes dist gaussian #23482341

fix 1 hydrogen shake 1e-6 500 0 m 1.0 a 1 #for hydrogen
fix 12 water npt temp 298 298 100.0 iso 0.0 0.0 1000.0

thermo_style custom step etotal enthalpy pe press ke
thermo_modify flush yes

run 400
reset_timestep 0

Green-Kubo viscosity calculation

Define distinct components of symmetric traceless stress tensor

variable pxy equal pxy
variable pxz equal pxz #-press
variable pyz equal pyz

fix SS all ave/correlate $s $p $d &
v_pxy v_pxz v_pyz type auto file S0St.dat ave running

v_pxy v_pxx type auto file profile.gk.3d ave running

variable scale equal {convert}/({kB}$T)$V*s*{dt}

variable v11 equal trap(f_SS[3]){scale} variable v22 equal trap(f_SS[4])*{scale}
variable v33 equal trap(f_SS[5])
#*******************************#thermal conductivity
compute myKE all ke/atom
compute myPE all pe/atom
compute myStress all stress/atom NULL virial
compute flux all heat/flux myKE myPE myStress
variable Jx equal c_flux[1]/vol
variable Jy equal c_flux[2]/vol
variable Jz equal c_flux[3]/vol
fix JJ all ave/correlate $s $p d & c_flux[1] c_flux[2] c_flux[3] type auto file J0Jt.dat ave running variable scale equal {convert}/${kB}/$T/$T/$V
variable k11 equal trap(f_JJ[3])
{scale} variable k22 equal trap(f_JJ[4])*{scale}
variable k33 equal trap(f_JJ[5])

thermo_style custom step temp press v_pxy v_pxz v_pyz v_v11 v_v22 v_v33 v_Jx v_Jy v_Jz v_k11 v_k22 v_k33

run 3000
variable k equal (v_k11+v_k22+v_k33)/3.0
variable ndens equal count(all)/vol
print “average conductivity: $k[W/mK] @ T K, {ndens} /A^3”