With this command the user can avoid examining all the objects found on the artificial image and, consequently, is able to save a considerable amount of time. FCLEAN/ROMAFOT compares the intermediate file created by GROUP/ROMAFOT to the catalogue created by ADDSTAR/ROMAFOT and selects only the windows which contain an artificial image. This way the number of windows passed to FIT/ROMAFOT is drastically reduced and the user can afford a statistically significative simulation by making repeated trials. The final results can be statistically examined with CHECK/ROMAFOT.