Enter an atomic species: Al Enter a cubic lattice type: fcc Enter a model name: EAM_QuinticHermiteSpline_ErcolessiAdams_1994_Al__MO_781138671863_002 Enter a lattice constant (m): 4.032082462310791e-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 = 6.948e-09*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 6.948e-09*i)