EMSAO: Turn off smoothing (NSMOOTH=0 or 0) before identifying lines to redo emission line search EMSAO: In case of crash with "ERROR: [floating operand error]", try rerunning with vel_init="search". Chances are the correlation velocity isn't too good, or that it points at a bad line. Another possibility is an inadequate continuum fit. Try changing the order in contpars by 1 or 2, if EMSAO has been working on your data, or by more if it hasn't yet worked.