Error related to airebo force field

Hello everyone,

I am using airebo potential for C-C bonding in diamond. However I always obtain the following error

ERROR: Incorrect args for pair coefficients (…/pair_airebo.cpp:160)

It seems lammps cannot locate CH.airebo file. I have kept it in my current directory as well.

My code is as below.

Any suggestion is highly appreciated.



units metal
dimension 3
boundary p p p
atom_style full

----------------------- ATOM DEFINITION ----------------------------

lattice diamond 3.57

region upper block 0 50 0 50 0 80 units box

create_box 1 upper

mass 1 12

create_atoms 1 region upper

------------------------ FORCE FIELDS ------------------------------

pair_style airebo 3.0
pair_coeff * * airebo CH.airebo NULL C