Enter an atomic species: Ag Enter a cubic lattice type: fcc Enter a model name: MEAM_LAMMPS_LeeShimBaskes_2003_Ag__MO_969318541747_000 Enter a lattice constant (m): 4.07293501496315e-10 WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 3.916e-09*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 3.916e-09*i)