Enter an atomic species: Pd Enter a cubic lattice type: fcc Enter a model name: MEAM_LAMMPS_JeongParkDo_2018_PdAl__MO_616482358807_000 Enter a lattice constant (m): 3.889087289571762e-10 Writing phonon.eq.pckl Writing phonon.0x-.pckl Writing phonon.0x+.pckl Writing phonon.0y-.pckl Writing phonon.0y+.pckl Writing phonon.0z-.pckl Writing phonon.0z+.pckl WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 3.081e-09*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 3.081e-09*i)