CUTSYS

Separate the system in subsystems (not necessary if MOLECULES keyword is used)

NMOL=

number of subsystems

NATMOL=

number of atoms per subsystem (all molecules have the same number of atoms)

RIGID

In the case of Monte Carlo exploration, these subsystems will be treated as rigid

ALLATOMS

The subsystems will never be treated as rigid

RANDOM

Random quaternions will be associated to these subsystems