[gmx-users] The solvent group Water is not continuous

Justin A. Lemkul jalemkul at vt.edu
Fri Apr 1 14:33:14 CEST 2011



ahmet yıldırım wrote:
> Dear users,
> 
> I created nonaminoacid TRS.itp and EDO.itp files using ProDrg Beta.
> 

...and hopefully did a complete re-parameterization of the nonsense charges it 
gives.

http://www.gromacs.org/Downloads/Related_Software/PRODRG#Tips

That's an aside, completely unrelated to your actual problem, though.

> genion -s em.tpr -o solvated.gro -nname Na -nn 15 -g em.log
> select group:13
> Fatal error:
> The solvent group SOL is not continuous: index[984]=5334, index[985]=5355
> For more information and tips for troubleshooting, please check the GROMACS
> website at http://www.gromacs.org/Documentation/Errors
> 

You still haven't answered the second question I posed below.  I assume this 
"em.tpr" file has not been re-generated from a properly continuous .gro and .top 
combination.  If either were out of order with respect to the other (i.e. 
changing the .top and not the .gro), you would have gotten a fatal error from 
grompp when creating em.tpr.

-Justin

> 
> 
> 01 Nisan 2011 15:17 tarihinde Justin A. Lemkul <jalemkul at vt.edu 
> <mailto:jalemkul at vt.edu>> yazdı:
> 
> 
> 
>     ahmet yıldırım wrote:
> 
>         I tried SOL 44453 but I still the same error
> 
> 
>     Are you using some index file that is specifying a discontinuous
>     water group? Have you properly re-created your genion input .tpr
>     file from this new topology?
> 
>     -Justin
> 
>         01 Nisan 2011 15:11 tarihinde Mark Abraham
>         <Mark.Abraham at anu.edu.au <mailto:Mark.Abraham at anu.edu.au>
>         <mailto:Mark.Abraham at anu.edu.au
>         <mailto:Mark.Abraham at anu.edu.au>>> yazdı:
> 
> 
>            On 1/04/2011 11:03 PM, ahmet yıldırım wrote:
> 
>                Dear Dr. Mark,
> 
>                I did you said but I have the same error. please look at
>             attached file
> 
>                topol.top:
> 
>                [ molecules ]
>                ; Compound        #mols
>                Protein_chain_A     1
>                Protein_chain_B     1
>                SOL               185
>                SOL               143
>                SOL             44125
>                TRS                1
>                EDO                1
> 
> 
>            OK, well maybe it doesn't like different chunks of the same
>         molecule
>            even when they're adjacent in order. Try "SOL 44453" instead.
> 
>            Mark
> 
> 
>                01 Nisan 2011 14:41 tarihinde Mark Abraham
>                <Mark.Abraham at anu.edu.au <mailto:Mark.Abraham at anu.edu.au>
>             <mailto:Mark.Abraham at anu.edu.au
>             <mailto:Mark.Abraham at anu.edu.au>>> yazdı:
> 
> 
>                    On 1/04/2011 10:26 PM, ahmet yıldırım wrote:
> 
>                        Dear Justin,
> 
>                        I have Fatal Errror:The solvent group Water is not
>                        continuous. I look at gmx-users mailing list
>             search. I
>                        also have the same problem.
>                        You
>                      
>              said:(http://lists.gromacs.org/pipermail/gmx-users/2010-January/048344.html)
>                        It is exactly what I said; you've proven it. You have
>                        solvent, ligand, then
>                        solvent. To use genion (as the program prints out
>             at the
>                        prompt) you must have
>                        a *continuous* group of solvent in order to embed
>             ions. If
>                        you re-arrange the
> 
>                        coordinate file and [molecules] section of the
>             topology,
>                        you can achieve this.
> 
>                        How can I do the re-arrange you said? Can you
>             explain a
>                        little bit?
> 
> 
>                    You need a system topology whose molecules are
>             ordered such
>                    that all the water is contiguous. That means the
>             order of the
>                    names of molecule types in your [ molecules ] section
>             of your
>                    .top can have only one mention of water. Since the
>             order of
>                    molecules in the coordinate file must match this
>             order, you
>                    will need to physically reorder your [ molecules ]
>             section,
>                    and the chunks of molecules in your coordinate file.
>                    Fortunately, you don't have to renumber those atoms
>             in the
>                    coordinate file.
> 
>                    Mark
> 
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> 
> 
>                --     Ahmet YILDIRIM
> 
> 
> 
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> 
> 
>         -- 
>         Ahmet YILDIRIM
> 
> 
>     -- 
>     ========================================
> 
>     Justin A. Lemkul
>     Ph.D. Candidate
>     ICTAS Doctoral Scholar
>     MILES-IGERT Trainee
>     Department of Biochemistry
>     Virginia Tech
>     Blacksburg, VA
>     jalemkul[at]vt.edu <http://vt.edu> | (540) 231-9080
>     http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
> 
>     ========================================
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> 
> 
> 
> -- 
> Ahmet YILDIRIM

-- 
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

========================================



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