Enter an atomic species: Pb Enter a cubic lattice type: fcc Enter a model name: EAM_Dynamo_ZhouJohnsonWadley_2004_CuAgAuNiPdPtAlPbFeMoTaWMgCoTiZr__MO_870117231765_000 Enter a lattice constant (m): 4.949355715513235e-10 WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.493e-09*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.493e-09*i)