Enter an atomic species: Cu Enter a cubic lattice type: fcc Enter a model name: EAM_Dynamo_WilliamsMishinHamilton_2006_CuAg__MO_128703483589_005 Enter a lattice constant (m): 3.614999994635582e-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, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 8.547e-09*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 8.547e-09*i)