warning Bond/angle/dihedral extent > half of periodic box length

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1

Hello users
I am using opls parameters for graphene oxide . when I run this script, run completed and I get the following error:
warning Bond/angle/dihedral extent > half of periodic box length

I read the lammps mailing list about my question bot I do not
Understand.

inpute script:

Created by charmm2lammps v1.6.2 on Fri Jun 3 14:07:02 MDT 2005

units real
neigh_modify delay 2 every 1
atom_style full
read_data mix.data

bond_style harmonic

angle_style harmonic

dihedral_style opls

#improper_style harmonic

pair_style lj/charmm/coul/long 8 10

pair_modify mix arithmetic
kspace_style ewald 1e-4

special_bonds charmm ?
fix 1 all nve
#fix 2 all shake 1e-6 500 b 1 2 3 4 5 6
velocity all create 0.0 12345678 dist uniform

thermo 100
thermo_style multi
timestep 0.5

restart 10 1ac7.restart1 1ac7.restart2
dump 1 all dcd 100 1ac7.dcd
#dump_modify 1 image yes scale yes

run 10000

2

Hello users
I am using opls parameters for graphene oxide . when I run this script, run
completed and I get the following error:
warning Bond/angle/dihedral extent > half of periodic box length
I read the lammps mailing list about my question bot I do not
Understand.

this means that you have one or more bonds defined between two atoms
that is so long that LAMMPS will rather use the periodic image of one
of the atoms. this can be either an error in the input due to
incorrectly specified image flags or desired, when you build a
periodic system with explicit bonds.

axel