I did the same few month back and tested for any changes in the results for 
different values maxa, and could not see any consequences 


________________________________
 From: CHRISTIAN VIALES MONTERO <[email protected]>
To: [email protected] 
Sent: Wednesday, January 8, 2014 5:29 PM
Subject: [SIESTA-L] Vibrator
 


Dear SIESTA users, when using VIBRA 0.3's Vibrator with a unit cell of 14 atoms 
an error ocurrs (chkdim call on fcbuild subroutine) indicating maxa is too 
small. I went back to vibra.h and modified its value from 8 to 55 (for 
subsequent calculations). Now the utility runs ok, but are there any additional 
consequences of doing this that I'm not aware of?

Responder a