Enter an atomic species: Cu Enter a cubic lattice type: fcc Enter a model name: EAM_Dynamo_FischerSchmitzEich_2019_CuNi__MO_266134052596_000 Enter a lattice constant (m): 3.615000084042549e-10 WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.278e-08*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.278e-08*i)