Reverse order the seismic line because it's shot from west to east and we want to plot it from east to west. The rp numbers of the input file MUST be strictly montonically increasing. sioseis << eof procs sort diskin diskoa end sort rev1 yes lkey1 6 ipath /data/vol3/henkart/fdm.line6.1s opath s6 end end diskin ipath /data/vol3/henkart/fdm.line6.1s spath s6 end end diskoa fon 6001 opath fdm.line6.1 end end end eof