Does anyone know of a way to put comments in a "sed" script? Failing that, does anyone know that it is not possible to do so? Please reply via E-mail as I do not monitor this group. John W. Matthews Institute for Biomedical Computing Lopata Hall, Box 1099 Washington University St. Louis, MO 63130 USA (314) 362-3119 ..!{ihnp4,seismo}!wucs!jwm