Enter an atomic species: Cu Enter a cubic lattice type: fcc Enter a model name: EAM_Dynamo_CaiYe_1996_AlCu__MO_942551040047_005 Enter a lattice constant (m): 3.614728152751923e-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, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.040e-08*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.040e-08*i)