Enter an atomic species: Pd Enter a cubic lattice type: fcc Enter a model name: MEAM_LAMMPS_JeongLee_2020_PdC__MO_068985622065_001 Enter a lattice constant (m): 3.889087289571762e-10 WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 9.482e-10*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 9.482e-10*i)