[Pw_forum] rgen: error 4, too many r-vectors

[Martin Andersson]

Hi,

I am performing pw.x calculations including empirical london dispersion. 
I was investigating how my results vary as a function of the cutoff for 
the dispersion interaction, and got the following message for very short 
cutoffs:

   from rgen : error #         2
      too many r-vectors

with PBE and london_s6=0.75. If I use revpbe and s6=1.25 the error 
number is 4 but otherwise the same.

Any thoughts on why I get this error?

Regards,
Martin Andersson
University of Copenhagen