Enter an atomic species: Pt Enter a cubic lattice type: fcc Enter a model name: MEAM_LAMMPS_KimSeolJi_2017_PtTi__MO_280985530673_001 Enter a lattice constant (m): 3.917371556162834e-10 WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 4.524e-09*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 4.524e-09*i)