Problems with buck/coul/long potential

Dear lammps-users!
I’m simulating a monomer and the paper i’m refering to uses buck/coul/long potential.
However when I tried to simulate it it gives me a mistake
ERROR: All pair coeffs are not set (pair_buck_coul_long.cpp:261) (see log.lammps)
After some search i realized that i have to set some i-j ( i != j) coeffs in my data-file . But there is no information on the Lammps site about that.
What do I do?
Best regards, Vasiliy.

P.S Attachment : 1) log-file 2) my data file

in.Buck_data (10.4 KB)

log.lammps (1.56 KB)

Dear lammps-users!
I'm simulating a monomer and the paper i'm refering to uses buck/coul/long
potential.
However when I tried to simulate it it gives me a mistake
ERROR: All pair coeffs are not set (pair_buck_coul_long.cpp:261) (see
log.lammps)
After some search i realized that i have to set some i-j ( i != j) coeffs
in my data-file . But there is no information on the Lammps site about
that.
What do I do?

set your potential parameters using
the pair_coeff command in the input file.

axel.

Thank you for a quick response.

But, so it is true that there is no way of doing that via the data-file?

2012/6/19 Axel Kohlmeyer <[email protected]>

There is not, b/c this potential does not support auto-mixing to generate
IJ interactoins. See its doc page for details, as well as the pair_modify
doc page for a discussion of mixing.

Steve