>> O1 x y z >> (in newer versions, O1 48f x y z) *** IN NEWER VERSIONS ***. Your version is not new. -- Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222