On May 31, 2010, at 18:10 , loc duong ding wrote: > The problem is when the code calcualtion second order response, > it is not convergence.
try to reduce "alpha_mix" to a smaller value, 0.3 or 0.1 or whatever is appropriate (default is 0.7) P. --- Paolo Giannozzi, Dept of Physics, University of Udine via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222
