fix atc mesh create_faceset gives "faceset is empty"?

I used on of the examples to test the atc package. Here’s my simple input script

units metal
atom_style atomic

read_data #equilibrated aluminum data-file
lattice fcc 4 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1 #I have to define a lattice, otherwise Atc reports a warning