about modeling two fullenrens

Hi Everybody,
I want to simulate interaction between two fullerenes (C60) with AIREBO potential.
I want every C60 to have AIREBO between its atoms and LJ potential between two different C60’s.

I tried this for pair style definition:

pair_style hybrid airebo 3 0 0 lj/cut 10
pair_coeff * * airebo CH.airebo C NULL
pair_coeff * * airebo CH.airebo NULL C
pair_coeff 1 2 lj/cut 0.0207 3.16

But I encountered an error of all pairs coeffs are not defined.
How can I separate two C60 in AIREBO potential?
I know that Neigh_modify exclude do that, but in that way I also lose the LJ potential between C60’s. So they go through each other.
I would be so glad if anybody helps me.
Thanks a lot.
Hamid

You can't use pair hybrid in that way, with AIREBO used
independently for 2 subsets of atoms. LAMMPS doesn't
support that and I can't think of a simple way to let it do that.

Physically, what you are describing doesn't really make
sense to me. How does a C atom in one fullerene know
that another C atom is in the same or a different fullerene?

Steve