number of cells and number of vectors did not agree???

Message

wjfriend · #1 Post by **wjfriend** » Sun Sep 25, 2011 5:45 am

I got the following error informaiton for my calculaiton. I tried to change the SYMPREC to 1e-8, but the error still exists. Can anyone give me some suggestions. Thanks.

VERY BAD NEWS! internal error in subroutine PRICEL (probably precision problem, try to change SYMPREC in INCAR ?):
Sorry, number of cells and number of vectors did not agree. 2

#2 Post by **admin** » Wed Oct 05, 2011 4:23 pm

This problem appears with supecells and high symmetry atomic positions. Because of symmetry elements PRICEL cannot recognize the cell as a primitive cell.What helps is a slight move of atoms in high symmetry positions. E.g. move atom (0.0 0.0 0.0) to 0.0 0.0 0.0001. This breaks the symmetry and the cell is recognized as the primitive cell.

hess8 · #3 Post by **hess8** » Mon Oct 17, 2011 8:54 pm

Thanks, I had the same error and your solution worked. You should put that advice in the error message itself