[gmx-users] genion doesn't work in 4.6.1?

[Warren Gallin]

Don't you have to give tyne name of the positive and negative ions that will be added by genion?  Otherwise, how would it know?

Warren Gallin

On 2013-04-05, at 1:05 PM, Albert <mailmd2011 at gmail.com> wrote:

> Hello:
> 
> I found that there would be some problem of genion in 4.6.1:
> 
> grompp_mpi -f em.mdp -c solv.gro -p complex.top -o ions.tpr
> 
> NOTE 1 [file complex.top, line 44008]:
>  System has non-zero total charge: -11.000000
>  Total charge should normally be an integer. See
>  http://www.gromacs.org/Documentation/Floating_Point_Arithmetic
>  for discussion on how close it should be to an integer.
> 
> 
> genion_mpi -s ions.tpr -o solv_ions.gro -p complex.top -neutral -norandom
> 
> Reading file ions.tpr, VERSION 4.6.1 (single precision)
> Using a coulomb cut-off of 1.2 nm
> No ions to add and no potential to calculate.
> 
> Obviously, the total charge of the system is -11.0, but genion doesn't add anything to netural it....
> 
> 
> thank you very much
> best
> Albert
> 
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