[gmx-users] Software inconsistency error: Not enough water

Berk Hess gmx3 at hotmail.com
Thu Feb 11 13:57:50 CET 2010


Hi,

We are getting to much detail now.
In principle yes, but since you get a clear error message now, I wouldn't worry about this.
The chance that the last water block is willingly smaller than the number of ions is about zero.

Berk

> Date: Thu, 11 Feb 2010 13:34:59 +0100
> From: erikm at xray.bmc.uu.se
> To: gmx-users at gromacs.org
> Subject: Re: [gmx-users] Software inconsistency error: Not enough water
> 
> Hi,
> 
> Is it desirable that genion only considers a single SOL block? Why not 
> use them all if there are many?
> 
> Regards,
> 
> Erik
> 
> Berk Hess skrev:
> > Hi,
> >
> > genion in future Gromacs versions will only use the last SOL block
> > and give a proper error message when there is not enough water.
> >
> > Berk
> >
> > ------------------------------------------------------------------------
> > From: iitdckc at gmail.com
> > Date: Thu, 11 Feb 2010 16:45:06 +0530
> > Subject: Re: [gmx-users] Software inconsistency error: Not enough water
> > To: gmx-users at gromacs.org
> >
> >
> > Thanks berk.
> > By the way, if I dont give -p topol.top as input to genion, then 
> > genion executes. In this case, I manually edit the topology file and 
> > add the ion information.
> >  [ molecules ]
> > ; Compound        #mols
> > Protein_A           1
> > Protein_B           1
> > Protein_C           1
> > Protein_D           1
> > Protein_E           1
> > SOL                32
> > SOL                46
> > SOL                 3
> > SOL                13
> > SOL             19791
> > Na                 48
> >
> > This is my part of topology after adding ions (Na). In the previous 
> > case of genion was only considering first SOL information, which has 
> > only 32 molecules.
> >
> > Chandan 
> >
> >
> > --
> > Chandan kumar Choudhury
> > NCL, Pune
> > INDIA
> >
> >
> > On Thu, Feb 11, 2010 at 3:38 PM, Berk Hess <gmx3 at hotmail.com 
> > <mailto:gmx3 at hotmail.com>> wrote:
> >
> >     Hi,
> >
> >     This error message in incorrect, it is probably not a software
> >     inconsistency.
> >     Looking at the code, it seems the problem is that the topology file
> >     you provided does not have enough SOL molecules in the [molecules
> >     ] section.
> >     I'll fix this error message for the next release.
> >
> >     Berk
> >
> >     ------------------------------------------------------------------------
> >     From: iitdckc at gmail.com <mailto:iitdckc at gmail.com>
> >     Date: Thu, 11 Feb 2010 12:48:53 +0530
> >     To: gmx-users at gromacs.org <mailto:gmx-users at gromacs.org>
> >     Subject: [gmx-users] Software inconsistency error: Not enough water
> >
> >
> >     Hello gmxusers !!
> >     I am simulating a protein and it  is bound to ATP.
> >     Simulation of protein alone (without) works fine. Solely ATP
> >     simulation too works. But the problem arises on adding ions to the
> >     protein + ATP (1QHH.pdb) file.
> >     Error:
> >
> >
> >     $ genion -s em.tpr -o ion.pdb -p topol.top -np 48
> >     WARNING: turning of free energy, will use lambda=0      
> >     Reading file em.tpr, VERSION 4.0.7 (single precision)   
> >     Using a coulomb cut-off of 0.9 nm                       
> >     Will try to add 48 Na ions and 0 Cl ions.               
> >     Select a continuous group of solvent molecules          
> >     Opening library file
> >     /usr/local/gromacs/share/gromacs/top/aminoacids.dat
> >     Group     0 (      System) has 70056
> >     elements                          
> >     Group     1 (     Protein) has 10214
> >     elements                          
> >     Group     2 (   Protein-H) has  5107
> >     elements                          
> >     Group     3 (     C-alpha) has   623
> >     elements                          
> >     Group     4 (    Backbone) has  1869
> >     elements                          
> >     Group     5 (   MainChain) has  2488
> >     elements                          
> >     Group     6 (MainChain+Cb) has  3083
> >     elements                          
> >     Group     7 ( MainChain+H) has  3099
> >     elements                          
> >     Group     8 (   SideChain) has  7115
> >     elements                          
> >     Group     9 ( SideChain-H) has  2619 elements
> >     Group    10 ( Prot-Masses) has 10214 elements
> >     Group    11 ( Non-Protein) has 59842 elements
> >     Group    12 (         ATP) has    43 elements
> >     Group    13 (         SOL) has 59799 elements
> >     Group    14 (       Other) has 59842 elements
> >     Select a group: 13
> >     Selected 13: 'SOL'
> >     Number of (3-atomic) solvent molecules: 19933
> >
> >     Processing topology
> >
> >     Back Off! I just backed up temp.top to ./#temp.top.1#
> >
> >     -------------------------------------------------------
> >     Program genion, VERSION 4.0.7
> >     Source code file: gmx_genion.c, line: 269
> >
> >     Software inconsistency error:
> >     Not enough water
> >     -------------------------------------------------------
> >
> >     Though my system has sufficient amount of water (19933) molecules.
> >     Can not understand the error. Any information would be useful.
> >
> >
> >     Chadan
> >     --
> >     Chandan kumar Choudhury
> >     NCL, Pune
> >     INDIA
> >
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> 
> -- 
> -----------------------------------------------
> Erik Marklund, PhD student
> Laboratory of Molecular Biophysics,
> Dept. of Cell and Molecular Biology, Uppsala University.
> Husargatan 3, Box 596,    75124 Uppsala, Sweden
> phone:    +46 18 471 4537        fax: +46 18 511 755
> erikm at xray.bmc.uu.se    http://xray.bmc.uu.se/molbiophys
> 
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