using two potential

[Ahmad_Hosein_Poor]

thanks for your attentions
i hope that the energy has wasted from you for my question, be perdurable and returns to you , even more than it.

error massage (385 Bytes)

input script of pair_style (412 Bytes)

[_Ahmed_E_Ismail1]

You’re not using the tersoff style correctly:

http://lammps.sandia.gov/doc/pair_tersoff.html

—AEI