[Pw_forum] non-analytic term for q=0 missing

[Paolo Giannozzi]

On Thursday 03 November 2005 22:51, Alcantara Ortigoza, Marisol wrote:

> I'm trying to run matdyn.x for a certain q-grid and, although I get
> the vectors and frequencies files (which look correctly) I get an 
> error from matdyn.f90 (version 2.1.5) : 'non-analytic term for q=0
> missing!". 

you get a message, not an error. Somebody complained that he
didn't get the LO-TO splitting in phonon dispersions, so I added 
this message to warn that effective charges and dielectric tensor 
were not found in the dynamical matrix file at q=0 and thus the
LO-TO splitting will be absent. Since nobody seems to read even 
vaguely the users' guide, I'll write a more explicit message

-- 
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