Hello,
Please I really need help. I was trying to figure out the issue but failed miserably.
After carrying out ENCUT (36 Hartree) and KPOINTS grid (12x12x12) convergence tests (<1mHa), I aim at performing structure optimization for BaTiO3 perovskite. However, when running BaTiO3.abi, I got an error:
--- !ERROR
src_file: m_kg.F90
src_line: 181
mpi_rank: 3
message: |
Choice of acell, ngfft, and ecut
===> basis sphere extends BEYOND fft box !
Recall that boxcut=Gcut(box)/Gcut(sphere) must be > 1.
Action: try larger ngfft or smaller ecut.
Note that ecut=effcut/boxcut**2 and effcut= 6.531650
This situation might happen when optimizing the cell parameters.
Your starting geometry might be crazy.
See https://wiki.abinit.org/doku.php?id=howto:troubleshooting#incorrect_initial_geometry .
I increased ngfft value from 24 24 24 to 60 60 60, but such change did not work.
Could anyone please assist me in this problem?
I appended my ABINIT input file.
BaTiO3.abi (2.2 KB)
error.txt (528 Bytes)