Enter an atomic species: Cu Enter a cubic lattice type: fcc Enter a model name: EAM_Dynamo_DeluigiPasianotValencia_2021_FeNiCrCoCu__MO_657255834688_000 Enter a lattice constant (m): 3.620000123977662e-10 WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 8.441e-09*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 8.441e-09*i)