About pair coeff set

Dear all users and experts:
I am doing a experiment for both material SiO2 and Co to friction,
I use the atomsk to build a model
and read data for trying to that them friction
There have 3 atom type :1-O ;2-Si;3-Co
but when I run the program
It stops and let me know “All pair coeff are not set”
But I check that , it is already set for all atom type

below is my in file

Dear all users and experts:
I am doing a experiment for both material SiO2 and Co to friction,
I use the atomsk to build a model
and read data for trying to that them friction
There have 3 atom type :1-O ;2-Si;3-Co
but when I run the program
It stops and let me know “All pair coeff are not set”
But I check that , it is already set for all atom type

no. you have not. each “pair_coeff * * tersoff” line will wipe out the previous one. please note that tersoff is a manybody potential, so you are not only setting parameters for pairs, but for all permutations of triples including the selected atom types.
thus what you are doing makes no sense. you need just the first line, which sets all interactions between Si and O atoms.

also, you can verify you pair_coeff settings with the “info coeffs” command. it won’t tell you whether you have a bad model (as i can do), but it will list all pairs that are missing settings.

axel.