All pair coeffs are not set

Dear All users

I want to use Pavese force field( for

simulation of calcite crystal,

But I have a problem because I got this error :

ERROR: All pair coeffs are not set (…/pair.cpp:181)

There is a simple solution to your question, that can be found through a little bit of logical thinking. It is very educational to find it out for yourself. (what kind of potential function do you have between non-interacting particles?).