I am trying for the structure optimization via Gaussian16 DFT calculation, for a system consisting of C,H, N, O and Ce atoms. Where I am using B3LYP/ 6,311G(d,p) C, H, N and O and B3LYP/SDD for Ce. I am having error termination Error termination via Lnk1e in /share/apps/gaussian/g16/l502.exe
Any suggestion for normal termination?