Enter an atomic species: Cu Enter a cubic lattice type: fcc Enter a model name: Morse_Shifted_GirifalcoWeizer_1959MedCutoff_Cu__MO_173787283511_004 Enter a lattice constant (m): 3.613148130476475e-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, 3 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.759e-08*i) WARNING, 2 imaginary frequencies at q = ( 0.02, 0.02, 0.02) ; (omega_q = 1.986e-03*i) WARNING, 3 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.759e-08*i) WARNING, 1 imaginary frequencies at q = ( 0.01, 0.01, 0.03) ; (omega_q = 6.330e-03*i) WARNING, 1 imaginary frequencies at q = ( 0.03, 0.03, 0.05) ; (omega_q = 1.022e-02*i) WARNING, 1 imaginary frequencies at q = ( 0.04, 0.04, 0.08) ; (omega_q = 6.660e-03*i) WARNING, 1 imaginary frequencies at q = (-0.07, -0.05, -0.05) ; (omega_q = 1.066e-02*i) WARNING, 1 imaginary frequencies at q = (-0.05, -0.07, -0.05) ; (omega_q = 1.066e-02*i) WARNING, 1 imaginary frequencies at q = (-0.05, -0.05, -0.07) ; (omega_q = 1.066e-02*i) WARNING, 1 imaginary frequencies at q = (-0.05, -0.03, -0.03) ; (omega_q = 1.368e-02*i) WARNING, 1 imaginary frequencies at q = (-0.03, -0.05, -0.03) ; (omega_q = 1.368e-02*i) WARNING, 1 imaginary frequencies at q = (-0.03, -0.03, -0.05) ; (omega_q = 1.368e-02*i) WARNING, 2 imaginary frequencies at q = (-0.01, -0.01, -0.01) ; (omega_q = 1.892e-03*i) WARNING, 2 imaginary frequencies at q = ( 0.01, 0.01, 0.01) ; (omega_q = 1.892e-03*i) WARNING, 1 imaginary frequencies at q = ( 0.03, 0.03, 0.05) ; (omega_q = 1.368e-02*i) WARNING, 1 imaginary frequencies at q = ( 0.03, 0.05, 0.03) ; (omega_q = 1.368e-02*i) WARNING, 1 imaginary frequencies at q = ( 0.05, 0.03, 0.03) ; (omega_q = 1.368e-02*i) WARNING, 1 imaginary frequencies at q = ( 0.05, 0.05, 0.07) ; (omega_q = 1.066e-02*i) WARNING, 1 imaginary frequencies at q = ( 0.05, 0.07, 0.05) ; (omega_q = 1.066e-02*i) WARNING, 1 imaginary frequencies at q = ( 0.07, 0.05, 0.05) ; (omega_q = 1.066e-02*i)