ERROR on proc 0: Bond atoms 13 18 missing on proc 0 at step 1

[email protected]

Dear lammps users,

i am using lammps to simulate the polymer(polyaniline),
i had build the structure by using Materials Studio.
i generate more number of chains of polymer. and converted it
into lammps data file.if i run only one chain with more repeating unit it is running succesfully.
while running more number of chains
i am getting following error
ERROR on proc 0: Bond atoms 13 18 missing on proc 0 at step 1

can anyone help in regarding this.i can appreciate

As the error section of the manual explains, this is usually
due to bad dynamics, e.g. blowing atoms out of the box,
so that a bond cannot find its partner atom. Fix your simulation
and these kinds of problems go away.

Steve