On Feb 23, 2011, at 5:13 , YY wrote: > the same problem was report several times, but no clear answer. no clear report either. --- Paolo Giannozzi, Dept of Chemistry&Physics&Environment, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222