ERROR: Unknown fix style atom/swap (../modify.cpp:847)

Respected all,

I faced the error mentioned in subject (also log.lammps file attached)
I am using LAMMPS (31 MAR 2017) .
Can you help me, what is the mistake in defining style OR the error itself.
Thanking you in advance

Ni90Fe10_1300.txt (51.4 KB)

log.lammps (1.02 KB)

input (1.17 KB)

This fix is part of the MC package. It is only enabled if LAMMPS was built with that package. See the Making LAMMPS <> section for more info.