On Dec 14, 2007, at 9:09 , xu yuehua wrote: > thank you .although it does not work what "does not work", and what do you mean by "does not work"? --- Paolo Giannozzi, Dept of Physics, University of Udine via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222