Hi Paolo, But when I set plot_num = 0 or plot_num = 6, it works ok. And I don't delete any products of "scf" and "nscf" like "*.wfc", "*.pot", "*.rho" and "*.save". Yours, Ma -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.quantum-espresso.org/pipermail/users/attachments/20061213/583f313b/attachment.html>