[Wien] RKMAX and k-mesh

[Sergio L. Palacios Diaz]

Hello Wien community !

Just a simple question (I think):

I am running Wien2k for fcc-Ni and performing an analysis similar to
that done by S. Cottenier for bcc-Fe in his tutorial about LAPW methods.
The values of the total energy are decreasing for increasing values of
the RKMAX parameter and from RKMAX=11 the total energy starts to
increase. So, the optimal value (after S. Cottenier) is RKMAX=10.5
approx.
The k-mesh employed consists of 5000 k-points (165 in the irreducible
part).
I am wondering the following questions:
Is there something wrong in using such an unusual RKMAX value (the
recommended values are from 5 to 9)?
Is the effect of decreasing RKMAX similar to that of increasing the
k-mesh?

Any hint will be welcome.

Regards,
-- 
Dr. Sergio L. Palacios
Profesor Titular de Física Aplicada
Dpto. de Física--Facultad de Ciencias
Universidad de Oviedo
C/ Calvo Sotelo s/n
Oviedo 33007
Spain
Phone: +34 98 5 10 28 48
Fax: +34 98 5 10 33 24
e-mail: sergio at pinon.ccu.uniovi.es; slpalacios at uniovi.es