Re: [gmx-users] nstcomm < nstcalenergy

2017-08-29 Thread Justin Lemkul



On 8/29/17 1:47 AM, Simon Kit Sang Chu wrote:

Dear every user,

I am using Andersen thermostat and nstcomm should be set to 1 (step).
However, after specifying nstcomm = 1, an error has returned -

nstcalenergy cannot be smaller than nstcomm. GROMACS automatically sets it
to nstcalenergy step.


I fail to search for "nstcalenergy" in neither mdp nor manual.


It's there, and has been for several years:

http://manual.gromacs.org/documentation/2016.3/user-guide/mdp-options.html#output-control

If you're using an algorithm that requires global summation of energy 
terms, or otherwise limited by algorithmic requirements as you are here, 
you have to sum the energies at every step.  This slows things down, but 
in some cases (like yours) it's required.


-Justin

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Justin A. Lemkul, Ph.D.
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Virginia Tech Department of Biochemistry

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Re: [gmx-users] nstcomm < nstcalenergy

2017-08-29 Thread yujie liu

Hi,
Firstly, you should confirm your gromacs version, gromacs 5.x certainly 
includes nstcalenergy options in .mdp file. So you must set nstcalenergy=1 
while  the default value is 10 in .mdp if you want to nstcomm=1.

thanks
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[gmx-users] nstcomm < nstcalenergy

2017-08-28 Thread Simon Kit Sang Chu
Dear every user,

I am using Andersen thermostat and nstcomm should be set to 1 (step).
However, after specifying nstcomm = 1, an error has returned -

nstcalenergy cannot be smaller than nstcomm. GROMACS automatically sets it
to nstcalenergy step.


I fail to search for "nstcalenergy" in neither mdp nor manual.

I am asking again since I did not receive any reply on my previous post.
Sorry for my annoyance.

Regards,
Simon
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