[lammps-users] neigh_modify command

Dear LAMMPS users,
In simulation I am using two particles type: 1 of 6 diameter and the other 1 diameter. Whenever I run the program I get error:
[[email protected]…436… 6]$ mpirun -np 4 lmp_linux100<in.cylinder
LAMMPS (7 Jul 2009)
Lattice spacing in x,y,z = 1.58214 1.58214 1.58214
Reading data file …
orthogonal box = (-21 -21 -20) to (21 21 280)
1 by 1 by 4 processor grid
1500 atoms
1500 velocities
Created 5015 atoms
5015 atoms in group bs
1500 atoms in group up
Setting atom values …
5015 settings made for diameter
1 rigid bodies with 5015 atoms
WARNING: One or more atoms are time integrated more than once
Setting up run …

WARNING: One or more atoms are time integrated more than once
ERROR on proc 0: Neighbor list overflow, boost neigh_modify one or page

You should fix these 2 problems. One is bad, the other is fatal.
The error section of the manual explains both of them.

Steve