some error information given by NEB running

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jzhao
Posts: 16
Joined: Thu Sep 08, 2005 7:48 am

some error information given by NEB running

Post by jzhao »

I perform a NEB calculation, but after only one ionic step the calculation is finishced, and it gives the following error information:

NEBV Params: ispring,spring,spring2,spower,efirst,elast
NEBV Params: 3 5.00000000000000 5.00000000000000
1.00000000000000 0.00000000000000D+000 0.00000000000000D+000
NEB: DOING NEB!
NEBD: energy_flag_prev,next: F F
NEBD: Both higher or lower
NEBD: min, max energy: ??????????????????????? ???????????????????????
NEBD: Next gt Prev
NEBD: old_dot, prev_dot, next_dot: ???????????????????????
??????????????????????? ???????????????????????
Tangent
----------------------------------------------
???????????????????????????????????????
???????????????????????????????????????
???????????????????????????????????????
???????????????????????????????????????
???????????????????????????????????????
???????????????????????????????????????
???????????????????????????????????????
....
....
....
???????????????????????????????????????
???????????????????????????????????????
NEB: Forces: par spring, perp spring, perp real ???????????? 0.000000????????????
NEB: distance to prev, next image, angle between 0.596465 0.596465????????????
NEB: spring constants (prev,next) 5.000000 5.000000
NEB: projections on to tangent (spring, real) 0.000000????????????
NEB: Forces: max atom, RMS 0.000000????????????
FORCES: max atom, RMS 0.000000????????????

Who could tell me what is wrong?
Thanks a lot.
jzhao
Posts: 16
Joined: Thu Sep 08, 2005 7:48 am

Post by jzhao »

I use the parameters in INCAR
GGA=91
IBRION=3
POTIM=0.0
ISYM=0
ISMEAR=0;SIGMA=.1
NSW=200
NPAR=16
EDIFF = 0.1E-03
EDIFFG = -0.1E-01
PREC=med
LREAL=FALSE
LWAVE=.FALSE.


#neb parameters
ICHAIN = 0
IMAGES = 3
SPRING = -5.0
LCLIMB = .F.
LTANGENTOLD = .F.
LDNEB = .F.

Whether the reason is that the precision is too large, so after only one inoic step the programm crashes?

EDIFF = 0.1E-03
EDIFFG = -0.1E-01
ojwang
Posts: 1
Joined: Thu Jan 19, 2006 12:02 am

energies of your end points?

Post by ojwang »

Just wondering
Where are the energies of your end points?
jzhao
Posts: 16
Joined: Thu Sep 08, 2005 7:48 am

Post by jzhao »

Sorry, I dno't understand your means surely.

Do you mean the problem is related to the energy of the endpoint, or the energy of the endpoint should be provied in these information?
graeme
Site Admin
Posts: 2256
Joined: Tue Apr 26, 2005 4:25 am
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Post by graeme »

It looks like something is seriously wrong. If you send a .tar.gz of your run, we might be able to see what's wrong with it.

The best way to send files is to post a link. You could also submit to theory.cm.utexas.edu by anonymous ftp. (There are instructions there for submitting assignments, but it could be used for this purpose as well).
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