problem in FIST calculations of calcite (NaNs after 1st step)
wjg... at gmail.com
Mon Dec 1 22:10:07 UTC 2014
thanks for your answer. The issue was caused by wrongly formatted psf file
- last two indices for torsion angles were pointing to the same atoms.
After correction calcs start running OK but after while they crash. I need
to make more tries but it seems that there are no problems if I use default
units. All the parameters are taken from Pavese and Parker's potential
which I used with DL_POLY, but maybe it will be better to move them into
On Tuesday, November 25, 2014 5:35:57 PM UTC+1, Matt W wrote:
> Hi Wojtek,
> not sure exactly, but:
> (i) your bend potential is ludicrously strong - think you've probably
> misconverted units
> (ii) not sure the ordering of atoms in your torsion is what you want - or
> if you want a pure torsion for a planar trigonal molecule...
> HTH you track down the problem
> On Wednesday, November 19, 2014 10:35:37 PM UTC, Wojtek wrote:
>> I'm trying to run calcite force field calculations. I've started from the
>> simplest configuration with just one CaCO3 unit. The first energy
>> evaluation looks OK, but in the next step I'm getting NaN. Also coordinates
>> are NaNs.
>> Interestingly when I exclude angles and dihedrals, the simulation runs
>> without problems.
>> What I'm doing wrong?
>> I'm attaching the input and output files for both cases.
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