question about lammps

hello
i want to simulate water inside a nanotube but i got error in argument of pair coeff .
please help me to correct my input file.
thanks a lot

units real
dimension 3
boundary p p p
atom_style full

read_data cnt.data
read_data water.data add append offset 1 1 1 1 1
special_bonds lj/coul 0 0 0.5

pair_style hybrid/overlay lj/cut 10 tersoff lj/cut/tip4p/cut 3 2 2 2 0.15 8.5
pair_coeff * * tersoff SiC.tersoff C C
pair_coeff 1 2 none
pair_coeff 1 3 none
pair_coeff 2 3 none
pair_coeff 1 2 lj/cut 1 1 10
pair_coeff 1 3 lj/cut 1 1 10
pair_coeff 2 2 lj/cut/tip4p/cut 0.0 0.0
pair_coeff 2 3 lj/cut/tip4p/cut 0.0 0.0
pair_coeff 3 3 lj/cut/tip4p/cut 0.1550 3.1536
bond_style harmonic
bond_coeff 2 450 0.9572
angle_style charmm
angle_coeff 2 55 104.52 0.0 0.0

timestep 1
velocity all create 300 1234
fix 1 all nve
dump CNT_dump all xyz 10 CNT_dump.xyz
thermo 10
thermo_style custom step pe ke etotal

run 50000

there are far too many problems and errors with your input to list
them all here. it looks like you assembled this rather carelessly
through cut-n-paste or guessing of individual parts without any
previous testing and validation. resolving all of them for the
composite system is needlessly complex.

thus i strongly suggest you first set up a simulation for only the CNT
and test the correctness of it by comparing results of the CNT
properties with published data for the same choice of potential. and
then do the same for just bulk TIP4P water and again make sure that
you reproduce published data. then, and *only* then, you should
proceed to try simulating the hybrid system. you need to pay attention
to units, too. tersoff potentials bundled with LAMMPS require the
units metal setting.

axel.