Hello Jon and Justin

I had a MD simulation "dyn" running for 46 ns (actually it's 30 umbrella 
simulations using pull code)

I did try the -cpi option and my calculation seems to have restarted correctly 
renaming the files dyn.part0003.... 
But just running 
gmx mdrun -cpi  -noappend
does not allow me to tell the number of additional steps I want in my dynamics 
- So right now it's running 46 more ns (the original mdp and tpr file) which is 
not reasonable because I have 100s of calculations to run - I want to be able 
to specify 5 ns more for instance
Usually I use gmx convert-tpr - extend 5000 which builds a new tpr with which I 
can restart with -cpi

And running without a checkpoint file, Justin is not what I want - I really 
need to restart my dynamics after 46 ns, just I don't want the trr files - 
(I've got all the other files all right) - There should be a trick to restart 
without writing to a trr file... Isn't there ?

Thanks again for your help 


Serge Crouzy PhD HDR
Groupe de Modélisation et Chimie Théorique
Laboratoire de Chimie et Biologie des Métaux 
Département des Interfaces pour l'Energie, la Santé et l'Environnement
Institut de Recherche Interdisciplinaire de Grenoble
CEA Grenoble  UMR  CEA/CNRS/UJF 5249
17, rue des martyrs
38054 Grenoble Cedex 9
Bat. K  pièce 110   
Tel (33) 438782963
Fax (33) 438785487
http://big.cea.fr/drf/big/english/CBM/GMCT





-----Message d'origine-----
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<gromacs.org_gmx-users-boun...@maillist.sys.kth.se> De la part de 
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Envoyé : lundi 13 mai 2019 15:23
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Objet : gromacs.org_gmx-users Digest, Vol 181, Issue 30

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Today's Topics:

   1. Gromacs error while running energy minimization step
      (Muneeswaran S)
   2. Re: ligand in water (Bratin Kumar Das)
   3. Re: water mediated Hbond (Bratin Kumar Das)
   4. nmr distance restraints (Eiso AB)
   5. Restart dynamics when trr files removed (CROUZY Serge 119222)
   6. Re: Restart dynamics when trr files removed (John Whittaker)


----------------------------------------------------------------------

Message: 1
Date: Mon, 13 May 2019 17:36:36 +0530
From: Muneeswaran S <wmunee...@gmail.com>
To: gromacs.org_gmx-users@maillist.sys.kth.se
Subject: [gmx-users] Gromacs error while running energy minimization
        step
Message-ID:
        <CAN=_hbdryft2ppawmbmbx7euigkysycdjfdrgeojq2+e+rb...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

I got the following error while running the gromacs

























*NOTE: disabling dynamic load balancing as it is only supported with dynamics, 
not with integrator 'steep'.Using 16 MPI threadsUsing 4 OpenMP threads per tMPI 
threadOn host localhost.localdomain 2 GPUs auto-selected for this run.Mapping 
of GPU IDs to the 16 GPU tasks in the 16 ranks on this
node:
PP:0,PP:0,PP:0,PP:0,PP:0,PP:0,PP:0,PP:0,PP:1,PP:1,PP:1,PP:1,PP:1,PP:1,PP:1,PP:1-------------------------------------------------------Program:
gmx mdrun, version 2018.6Source file: src/gromacs/utility/filestream.cpp
(line 115)Function:    gmx::internal::FileStreamImpl::FileStreamImpl(const
char*, const char*)MPI rank:    12 (out of 16)System I/O error:Failed to
compile NBNXN kernels for GPU #Quadro P620  Could not open file 
'/usr/share/gromacs/opencl/nbnxn_ocl_kernels.cl
<http://nbnxn_ocl_kernels.cl>'    Reason: No such file or directory
(call to fopen() returned error code 2)For more information and tips for 
troubleshooting, please check the GROMACSwebsite at 
http://www.gromacs.org/Documentation/Errors
<http://www.gromacs.org/Documentation/Errors>*


------------------------------

Message: 2
Date: Mon, 13 May 2019 18:15:27 +0530
From: Bratin Kumar Das <177cy500.bra...@nitk.edu.in>
To: gmx-us...@gromacs.org
Subject: Re: [gmx-users] ligand in water
Message-ID:
        <cam7tw5t_i0ckx64h9fk0r1x_-+-jx1fuxrg5xgmpduh+4g9...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Hi
    The procedure you are following is not ok. Generate the co-ordinate file of 
ligand and the topology parameter file. Setup the box and add water to it. 
Lastly do energy minimisation.

On Thu 9 May, 2019, 2:33 PM RAHUL SURESH, <drrahulsur...@gmail.com> wrote:

> Hi Users.
>
> I want to simulate ligand in the water box. I prepared a water 
> molecule and started with pdb2gmx and then planned to follow protein-ligand 
> tutorial.
> Unfortunately ended up with an error in gro file format. Have check 
> every possibility but still couldn't find any solution.
> My initial pdb is water.pdb and the corresponding gro file is 
> water.gro. I clubbed the ligand gro file and water gro file as 
> complex.gro. I have uploaded the file here. can anyone help me with the 
> format issues>?
>
> --
> *Regards,*
> *Rahul *
> --
> Gromacs Users mailing list
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> * Please search the archive at
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> send a mail to gmx-users-requ...@gromacs.org.


------------------------------

Message: 3
Date: Mon, 13 May 2019 18:18:38 +0530
From: Bratin Kumar Das <177cy500.bra...@nitk.edu.in>
To: gmx-us...@gromacs.org
Subject: Re: [gmx-users] water mediated Hbond
Message-ID:
        <CAM7TW5u-KQ6tzvcawBo=VztGr1enPQj+38br5=ponfro+gj...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Hi,
     You can make a ndx file containing the residue of interest and the SOL. In 
gmx h-bond command use the index file. It will give you water mediated hbond

On Tue 7 May, 2019, 12:40 PM , <sp...@iacs.res.in> wrote:

> Dear all
> I want to determine the water mediated hydrogen between DNA bases and 
> small molecule. What extra flag should I use in gmx hbond command? Is 
> there any other option to capture the water mediated Hbonds? Please 
> suggest something.
> Sunipa Sarkar
> --
> Gromacs Users mailing list
>
> * Please search the archive at
> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before 
> posting!
>
> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
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> send a mail to gmx-users-requ...@gromacs.org.
>


------------------------------

Message: 4
Date: Mon, 13 May 2019 14:49:17 +0200
From: Eiso AB <eis...@gmail.com>
To: gromacs.org_gmx-users@maillist.sys.kth.se
Subject: [gmx-users] nmr distance restraints
Message-ID:
        <CAD3n-aaNenMX7g7XqmRorhmLwE8S3p_cY6qeLoZ4y=kpvjg...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Hi,
I've setup an mdrun with [ distance restraints ] but the restraints don't seem 
to have any effect on the simulation, so I'm wondering if there's anything i 
need to do to switch them on that I missed.

gmx disre or gmx nmr doesn't give any info about restraints.
and the .log file doesn't show any energy component for Distance Restraints, 
e.g.

   Energies (kJ/mol)
           Bond          Angle    Proper Dih. Ryckaert-Bell.  Improper Dih.
    4.14550e+03    1.13252e+04    1.29502e+04    9.20032e+01    6.00131e+02
          LJ-14     Coulomb-14        LJ (SR)   Coulomb (SR)   Coul. recip.
    5.01723e+03    6.08476e+04    3.13964e+05   -2.12124e+06    5.15532e+03
      Potential    Kinetic En.   Total Energy  Conserved En.    Temperature
   -1.70714e+06    2.85181e+05   -1.42196e+06   -1.34064e+06    2.99828e+02
 Pressure (bar)   Constr. rmsd
    1.15517e+02    4.10744e-06

I have defined restraints between protein, ligand and a few waters - all in 
different [molecules]
- so I used [ intemolecular_interactions ] followed by [ distance restraints ]


my topol.top ends like this :

[ system ]
; Name
Protein in water

[ molecules ]
; Compound        #mols
Protein_chain_A     1
lig                 1
SOL         35926
NA               4

[ intermolecular_interactions ]

[ distance_restraints ]
; ai  aj  type index type' low    up1    up2    fac ; # source
  465 564   1  0   1   0.2540 0.2540 0.4115 1  ; # 308 ile hd+ 216 val hg1+
2.54
  465 565   1  0   1   0.2540 0.2540 0.4115 1  ; #
  465 566   1  0   1   0.2540 0.2540 0.4115 1  ; #
  466 564   1  0   1   0.2540 0.2540 0.4115 1  ; #
  466 565   1  0   1   0.2540 0.2540 0.4115 1  ; #
  466 566   1  0   1   0.2540 0.2540 0.4115 1  ; #
  467 564   1  0   1   0.2540 0.2540 0.4115 1  ; #
  467 565   1  0   1   0.2540 0.2540 0.4115 1  ; #
  467 566   1  0   1   0.2540 0.2540 0.4115 1  ; #
[...snap...]
 1607  5241  1 34  1 0.5680 0.5680 0.6384 1  ; # 170 leu hd1# 411 lig h09
5.68
 1608  5241  1 34  1 0.5680 0.5680 0.6384 1  ; #
 1609  5241  1 34  1 0.5680 0.5680 0.6384 1  ; # [ ..snap ... ]
 2720  5571  1 52  2 0.1900 0.1900 0.2900 1  ; # 217 asp od1 501 sol hw2
1.90
 2720  5569  1 53  2 0.3000 0.3000 0.4000 1  ; # 217 asp od1 501 sol ow
3.00


disre is set to simple. From the mdout.mdp

[]$ grep disre mdout.mdp

; Distance restraints type: No, Simple or Ensemble
disre                    = Simple
; Force weighting of pairs in one distance restraint: Conservative or Equal
disre-weighting          = Conservative
; Use sqrt of the time averaged times the instantaneous violation
disre-mixed              = no
disre-fc                 = 1000
disre-tau                = 0
; Output frequency for pair distances to energy file
nstdisreout              = 100


gmx dump shows that the run topology has the distance restraints and looks ok 
to me

gmx dump -s md_0_10.tpr |grep -10 dis

[..snap..]
Reading file md_0_10.tpr, VERSION 2019-beta1 (single precision) Reading file 
md_0_10.tpr, VERSION 2019-beta1 (single precision)
   disre                          = Simple
   disre-weighting                = Conservative
   disre-mixed                    = false
   nstdisreout                    = 100
         0 type=1038 (DISRES) 464 563
         1 type=1038 (DISRES) 464 564
         2 type=1038 (DISRES) 464 565
         3 type=1038 (DISRES) 465 563
         4 type=1038 (DISRES) 465 564
         5 type=1038 (DISRES) 465 565
   [..snap ...]
  D.R.Viol. (nm):
      nr: 0
         [...snap...]

         functype[1038]=DISRES, label=   0, type=1, low= 2.54000008e-01,
up1= 2.54000008e-01, up2= 4.11500007e-01, fac= 1.00000000e+00)
         functype[1039]=DISRES, label=   1, type=1, low= 2.56999999e-01,
up1= 2.56999999e-01, up2= 4.12600011e-01, fac= 1.00000000e+00)
         functype[1040]=DISRES, label=   2, type=1, low= 3.72999996e-01,
up1= 3.72999996e-01, up2= 4.80199993e-01, fac= 1.00000000e+00)
         functype[1041]=DISRES, label=   3, type=1, low= 3.84000003e-01,
up1= 3.84000003e-01, up2= 4.88200009e-01, fac= 1.00000000e+00)
         functype[1042]=DISRES, label=   4, type=1, low= 2.33999997e-01,
up1= 2.33999997e-01, up2= 4.04900014e-01, fac= 1.00000000e+00)
         functype[1043]=DISRES, label=   5, type=1, low= 2.39999995e-01,
up1= 2.39999995e-01, up2= 4.06699985e-01, fac= 1.00000000e+00)
         functype[1044]=DISRES, label=   6, type=1, low= 3.03000003e-01,
up1= 3.03000003e-01, up2= 4.35000002e-01, fac= 1.00000000e+00)

etc...

Any suggestions about what is wrong here would be appreciated Thanks,

Eiso


------------------------------

Message: 5
Date: Mon, 13 May 2019 12:20:48 +0000
From: CROUZY Serge 119222 <serge.cro...@cea.fr>
To: "gromacs.org_gmx-users@maillist.sys.kth.se"
        <gromacs.org_gmx-users@maillist.sys.kth.se>
Subject: [gmx-users] Restart dynamics when trr files removed
Message-ID:
        <47ad30a9288c1e49bcf6c0cbb2e5bba654c28...@exdag0-a1.intra.cea.fr>
Content-Type: text/plain; charset="iso-8859-1"

Dear Gromacs users

I ran long MD simulations ( 50ns) with nstxout=5000 resulting in very large 
.trr files Realizing that I did not need these files (xtc enough), I removed 
them hoping to regenerate necessary restart files from a new gmx grompp and 
corrected mdp file (with nstxout=0)...
But NO - I can't restart the simulation  from 50 ns on without trr files - 
Whatever tricks I seem to have tried to fool the controls I hope someone can 
tell me how I can solve my problem  - Even if it is recompiling the source to 
remove the flag checking that the trr file is absent

Thanks for your help !

Serge Crouzy PhD HDR
Groupe de Mod?lisation et Chimie Th?orique Laboratoire de Chimie et Biologie 
des M?taux D?partement des Interfaces pour l'Energie, la Sant? et 
l'Environnement Institut de Recherche Interdisciplinaire de Grenoble CEA 
Grenoble  UMR  CEA/CNRS/UJF 5249 17, rue des martyrs
38054 Grenoble Cedex 9
Bat. K  pi?ce 110
Tel (33) 438782963
Fax (33) 438785487
http://big.cea.fr/drf/big/english/CBM/GMCT






------------------------------

Message: 6
Date: Mon, 13 May 2019 15:22:41 +0200
From: "John Whittaker" <johnwhitt...@zedat.fu-berlin.de>
To: gmx-us...@gromacs.org
Subject: Re: [gmx-users] Restart dynamics when trr files removed
Message-ID:
        <51954.160.45.109.178.1557753761.webm...@webmail.zedat.fu-berlin.de>
Content-Type: text/plain;charset=utf-8

Hi,

> But NO - I can't restart the simulation  from 50 ns on without trr 
> files

There should be a checkpoint file called (by default) state.cpt that was 
generated when your 50 ns simulation finished. You can use this file to 
continue your run from the final state of that simulation with:

gmx mdrun -cpi state.cpt

Your checkpoint file might be named something different than "state.cpt", but 
regardless, that procedure should do the trick.

Good luck,

John



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