Search found 5 matches

by mishralu
Mon Aug 11, 2014 9:54 am
Forum: VTSTTools
Topic: The convergence problem of NEB
Replies: 8
Views: 161651

Re: The convergence problem of NEB

Dear All,
I am trying to use force based optimizers- using IOPT =1 for LBFGS with these following settings-
ISTART = 0
ICHARG = 2 charge: 1-file 2-atom 10-const
ISPIN = 2
MAGMOM = 40*2.0 24*0
LASPH = T aspherical Exc in radial PAW
ICHAIN =0
IMAGES =5
IOPT =1
LCLIMB = .True.
Dispersion Interaction ...
by mishralu
Fri Apr 25, 2014 9:48 am
Forum: VTSTTools
Topic: NEB:convergence issues.
Replies: 5
Views: 128699

Re: NEB:convergence issues.

Dear Graeme,
Thank you very much. There was overlap of 2 atoms in my structure, though I have corrected this by manually moving atoms and at present calculations are running, Could you please let me know the right way to run nebavoid.pl, I tried to run this code but I was only getting POSCAR_orig ...
by mishralu
Sun Apr 20, 2014 12:40 pm
Forum: VTSTTools
Topic: NEB Convergence fails (EDDDAV: Call to ZHEGV failed. Return)
Replies: 1
Views: 60469

Re: NEB Convergence fails (EDDDAV: Call to ZHEGV failed. Ret

correction- I mentioned- it does not converge after even two ionic iteration- but I meant to say it doesnot converge even after 1-2 electronic iterations.
by mishralu
Sun Apr 20, 2014 11:31 am
Forum: VTSTTools
Topic: NEB Convergence fails (EDDDAV: Call to ZHEGV failed. Return)
Replies: 1
Views: 60469

NEB Convergence fails (EDDDAV: Call to ZHEGV failed. Return)

Dear All,
In CI-NEB calculations, my middle image do not converge even two ionic iteration, it stops after 1-3 electronic steps Error EDDDAV: Call to ZHEGV failed. Returncode = 32 2 18. I have tried NEB calculations with 3, 5, 8, 12 images but all having same problem.
I have tried ALGO normal, fast ...
by mishralu
Sun Apr 20, 2014 11:27 am
Forum: VTSTTools
Topic: NEB:convergence issues.
Replies: 5
Views: 128699

Re: NEB:convergence issues.

Hi,
I have similar issues. In CI-NEB calculations, Middle image do not converge even one ionic iteration, it stops after 1-3 electronic steps Error EDDDAV: Call to ZHEGV failed. Returncode = 32 2 18. I have tried NEB calculations with 3, 5, 8, 12 images but all having same problem.
I have tried ALGO ...