Mark Abraham escreveu:
Alexandre Suman de Araujo wrote:
Hi Gmxers

Some months ago I performed some simulations, with GMX 3.3.3 version, where I apply distance restraint between water oxygen atoms and a static dummy site located at the center of a sphere to keep waters inside this sphere. After performed an upgrade to GMX 4.0.5 version this distance restraint scheme stopped to work. I read distance restraint material in 4.0.5 paper manual and I can't find any modification reported there.

Looking at gmxdump output from tpr's generated with grompp from 3.3.3 and 4.0.5 versions and the same .mdp, .gro and .top files, I had this:

3.3.3 version: grep -i disre gmxdump3.txt |more

  disre                = Simple
  disre_weighting      = Conservative
  disre_mixed          = FALSE
  nstdisreout          = 100
functype[468]=DISRES, label= 0, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[469]=DISRES, label= 1, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[470]=DISRES, label= 2, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[471]=DISRES, label= 3, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[472]=DISRES, label= 4, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[473]=DISRES, label= 5, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00)
        .
        .
        .
functype[724]=DISRES, label= 256, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[725]=DISRES, label= 257, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00) functype[726]=DISRES, label= 258, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00)
       0 type=468 (DISRES) 389 392
       1 type=469 (DISRES) 393 396
       2 type=470 (DISRES) 397 400
       3 type=471 (DISRES) 401 404
       4 type=472 (DISRES) 405 408
       5 type=473 (DISRES) 409 412
       .
       .
       .
       256 type=724 (DISRES) 1413 1416
       257 type=725 (DISRES) 1417 1420
       258 type=726 (DISRES) 1421 1424

4.0.5 version: grep -i disre gmxdump4.txt

  disre                = Simple
  disre_weighting      = Conservative
  disre_mixed          = FALSE
  nstdisreout          = 100
functype[470]=DISRES, label= 0, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00)
           0 type=470 (DISRES) 0 3


It is clear that 3.3.3 version is applying the constraints to all waters (what is correct) and 4.0.5 to just one. However, I can't find a way to fix this.

Hmm, the above indicates that 3.3.3 wasn't folding the function type definitions correctly, and apparently 4.0.5 is folding the types as well as the references to them. If you're sure you've used the same .mdp/.top, then please submit a bugzilla (http://bugzilla.gromacs.org/) and attach a .tar of the .top, .mdp, .tpr and .gro files.
I'm submitting it in the next minutes.


Also have a look at grep -i disre -C 5 gmxdump4.txt to see if there's anything interesting in the local contexts of the differences.

The result of this grep:

  wall_atomtype[1]     = -1
  wall_density[0]      = 0
  wall_density[1]      = 0
  wall_ewald_zfac      = 3
  pull                 = no
  disre                = Simple
  disre_weighting      = Conservative
  disre_mixed          = FALSE
  dr_fc                = 10000
  dr_tau               = 0
  nstdisreout          = 100
  orires_fc            = 0
  orires_tau           = 0
  nstorireout          = 100
  dihre-fc             = 1000
  em_stepsize          = 0.01
--
functype[465]=LJ14, c6A= 4.00489662e-03, c12A= 4.51127153e-06, c6B= 4.00489662e-03, c12B= 4.51127153e-06 functype[466]=LJ14, c6A= 3.93701671e-03, c12A= 2.11467386e-06, c6B= 3.93701671e-03, c12B= 2.11467386e-06 functype[467]=LJ14, c6A= 4.08602087e-03, c12A= 3.19497235e-06, c6B= 4.08602087e-03, c12B= 3.19497235e-06
        functype[468]=CONSTR, dA= 1.00000001e-01, dB= 1.00000001e-01
        functype[469]=CONSTR, dA= 1.08999997e-01, dB= 1.08999997e-01
functype[470]=DISRES, label= 0, type=1, low= 0.00000000e+00, up1= 3.00000000e+00, up2= 9.39999962e+00, fac= 1.00000000e+00)
        functype[471]=SETTLE, doh= 1.00000001e-01, dhh= 1.63299993e-01
     fudgeQQ              = 1
  atomtypes:
atomtype[ 0]={radius= 0.00000e+00, volume= 0.00000e+00, surftens=-1.00000e+00, atomnumber= 7)} atomtype[ 1]={radius= 0.00000e+00, volume= 0.00000e+00, surftens=-1.00000e+00, atomnumber= 1)}
--
        excls[2][6..8]={0, 1, 2}
        excls[3][9..9]={3}
     Dis. Rest.:
        nr: 3
        iatoms:
           0 type=470 (DISRES) 0 3
     Settle:
        nr: 2
        iatoms:
           0 type=471 (SETTLE) 0
  moltype (2):

Well.... to me this does not add new information. Do you see something?


Mark

Does anyone could help me with this issue? Are there modifications in distance restraint algorithm in 4.0.5 version compared with 3.3.3 version? Or this can be a bug?

Thanks

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**************************************************************
Alexandre Suman de Araujo                                    *
Faculdade de Ciências Farmacêuticas de Ribeirão Preto        *
Universidade de São Paulo                                    *
Dep. de Física e Química                                     *
Grupo de Física Biológica     * e-mail: asara...@fcfrp.usp.br*
Av. do Café, s/n°             * e-mail: ale.su...@gmail.com  *
CEP: 14040-903                * Phone: +55 (16) 3602-4172    *
Ribeirão Preto, SP, Brasil    * Phone: +55 (16) 3602-4222    *
**************************************************************

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