problem with periodic boundary conditions

Dear All,

I am minimizing the energy of a gyroid filled with FCC lattice atoms.
When I use sss boundary conditions the energy gets minimized nicely.
However, when I use ppp boundary conditions, potential energy in the 0th step comes out to be infinite and pxx, pyy and pzz become “nan”.
I am attaching data, potential and input script files with this mail

Could anyone help me

Regards
Sivashankar

Au.eam.alloy (296 KB)

gyroid_data (515 KB)

in.begin (620 Bytes)

Dear All,
I am minimizing the energy of a gyroid filled with FCC lattice atoms.
When I use sss boundary conditions the energy gets minimized nicely.
However, when I use ppp boundary conditions, potential energy in the 0th
step comes out to be infinite and pxx, pyy and pzz become "nan".
I am attaching data, potential and input script files with this mail
Could anyone help me

have you checked for overlapping atoms?
specifically at the overlapping boundaries.

axel.