I have occasionally seen small numerical differences to build up into rather different convergence pattern. There is nothing obviously wrong in your input and output data.
P. -- Paolo Giannozzi e-mail: giannozz at nest.sns.it Scuola Normale Superiore Phone: +39/050-509876, Fax:-563513 Piazza dei Cavalieri 7 I-56126 Pisa, Italy
