[gmx-users] weird mdrun...using gromacs 3.3.3

Naga Rajesh Tummala rajesh.tnr at gmail.com
Tue Sep 8 06:28:09 CEST 2009


Dear Mark,

Some groups which were constrained in all 3 dimensions in one .mdp whereas
in other .mdp that groups were not constrained in x-direction.
But now I used same .mdp file and now even "nrdf" are same.

Strangely (common atleast when doing this simulation), the total energy and
other thermodynamics quantities were "nan" before but now they show some
huge number.

One thing I observed is the simulation runs fine only once (esp. first
time), but throws up error innumerous times after that.

I am using the same GROMACS built, same .mdp file and same values for GMXLIB
(I never changed them so far)

Below are the comparison of thermodynamic comparsions

LJ (SR)          step   0:        103090,  step   0:   4.7561e+18
Potential        step   0:       -707489,  step   0:   4.7561e+18
Kinetic En.      step   0:       1468.08,  step   0:  1.02499e+35
Total Energy     step   0:       -706021,  step   0:  1.02499e+35
Temperature      step   0:       4.35424,  step   0:  3.04006e+32
Pressure (bar)   step   0:      -3712.49,  step   0:  2.73697e+33
Vir-XX           step   0:       44045.4,  step   0: -5.41605e+20
Vir-XY           step   0:      -2748.83,  step   0:  1.41247e+20
Vir-XZ           step   0:       1057.24,  step   0:  4.23707e+20
Vir-YX           step   0:      -2800.27,  step   0:  1.41247e+20
Vir-YY           step   0:       46710.7,  step   0: -1.87114e+20
Vir-YZ           step   0:        2599.8,  step   0:  1.39343e+19
Vir-ZX           step   0:       1091.55,  step   0:  4.23708e+20
Vir-ZY           step   0:       2549.65,  step   0:  1.39336e+19
Vir-ZZ           step   0:       49744.6,  step   0: -2.84725e+21
Pres-XX (bar)    step   0:      -3489.58,  step   0:  1.70507e+33
Pres-XY (bar)    step   0:       219.836,  step   0: -5.38913e+32
Pres-XZ (bar)    step   0:       -84.925,  step   0: -2.37631e+33
Pres-YX (bar)    step   0:       223.957,  step   0: -5.38913e+32
Pres-YY (bar)    step   0:      -3703.21,  step   0:  2.67507e+32
Pres-YZ (bar)    step   0:      -208.473,  step   0:   6.2505e+32
Pres-ZX (bar)    step   0:      -87.6739,  step   0: -2.37631e+33
Pres-ZY (bar)    step   0:      -204.455,  step   0:   6.2505e+32
Pres-ZZ (bar)    step   0:      -3944.69,  step   0:  6.23832e+33
#Surf*SurfTen    step   0:      -2141.58,  step   0:  3.22932e+34
LJ-SR:FMN-CNT    step   0:      -588.918,  step   0:  2.06986e+18
LJ-SR:FMN-CMT    step   0:      -558.573,  step   0:  1.26082e+18
LJ-SR:CNT-SOD    step   0:       -1.1571,  step   0:  3.29985e+12
LJ-SR:CNT-SOL    step   0:      -305.429,  step   0:  1.42541e+18
LJ-SR:SOD-CMT    step   0:     -0.717905,  step   0:  5.87209e+11
T-System         step   0:       4.35424,  step   0:  3.04006e+32

*previously*

LJ (SR)          step   0:        103090,  step   0:          nan
Potential        step   0:       -707489,  step   0:          nan
Kinetic En.      step   0:       1468.08,  step   0:          nan
Total Energy     step   0:       -706021,  step   0:          nan
Temperature      step   0:       4.35424,  step   0:          nan
Pressure (bar)   step   0:      -3712.49,  step   0:          nan
Vir-XX           step   0:       44045.4,  step   0:          nan
Vir-XY           step   0:      -2748.83,  step   0:          nan
Vir-XZ           step   0:       1057.24,  step   0:          nan
Vir-YX           step   0:      -2800.27,  step   0:          nan
Vir-YY           step   0:       46710.7,  step   0:          nan
Vir-YZ           step   0:        2599.8,  step   0:          nan
Vir-ZX           step   0:       1091.55,  step   0:          nan
Vir-ZY           step   0:       2549.65,  step   0:          nan
Vir-ZZ           step   0:       49744.6,  step   0:          nan
Pres-XX (bar)    step   0:      -3489.58,  step   0:          nan
Pres-XY (bar)    step   0:       219.836,  step   0:          nan
Pres-XZ (bar)    step   0:       -84.925,  step   0:          nan
Pres-YX (bar)    step   0:       223.957,  step   0:          nan
Pres-YY (bar)    step   0:      -3703.21,  step   0:          nan
Pres-YZ (bar)    step   0:      -208.473,  step   0:          nan
Pres-ZX (bar)    step   0:      -87.6739,  step   0:          nan
Pres-ZY (bar)    step   0:      -204.455,  step   0:          nan
Pres-ZZ (bar)    step   0:      -3944.69,  step   0:          nan
#Surf*SurfTen    step   0:      -2141.58,  step   0:          nan
LJ-SR:FMN-CNT    step   0:      -588.918,  step   0:  2.06986e+18
LJ-SR:FMN-CMT    step   0:      -558.573,  step   0:  1.26082e+18
LJ-SR:CNT-SOD    step   0:       -1.1571,  step   0:  3.29985e+12
LJ-SR:CNT-SOL    step   0:      -305.429,  step   0:          nan
LJ-SR:SOD-CMT    step   0:     -0.717905,  step   0:  5.87209e+11
LJ-SR:CMT-SOL    step   0:      -313.823,  step   0:          nan
T-System         step   0:       4.35424,  step   0:          nan

Thanks
Rajesh


On Mon, Sep 7, 2009 at 11:00 PM, Mark Abraham <Mark.Abraham at anu.edu.au>wrote:

> Naga Rajesh Tummala wrote:
>
>> Dear Mark,
>>
>> When I compare the .tpr files the following is the online line where its
>> different
>> "inputrec->grpopts.nrdf[0] (8.240200e+04 - 8.110200e+04)"
>>
>
> IIRC "nrdf" is short for "number of degrees of freedom" which in turn
> suggests that the number of constraints has changed between the files, but I
> don't know if that's consistent with all other .tpr entries being identical.
>
> Did you make these .tpr files with different .mdp files? Different GMXLIB
> values? Different GROMACS installations?
>
> Mark
>
>
>  When I compare two energy files,
>> "LJ-SR:FMN-CNT    step   0:      -588.918,  step   0:  2.06986e+18
>> LJ-SR:FMN-CMT    step   0:      -558.573,  step   0:  1.26082e+18
>> LJ-SR:CNT-SOD    step   0:       -1.1571,  step   0:  3.29985e+12
>> LJ-SR:CNT-SOL    step   0:      -305.429,  step   0:          nan
>> LJ-SR:SOD-CMT    step   0:     -0.717905,  step   0:  5.87209e+11
>> LJ-SR:CMT-SOL    step   0:      -313.823,  step   0:          nan"
>>
>> The total energies  and also the virial, pressure, surface tension and
>> other
>> thermodynamics quantities are different.
>>
>> When I compare .trr files, there is no difference between two files in the
>> initial step.
>>
>> I personally felt that there was something wrong with the force field
>> files,
>> but I could not find anything there.
>>
>> Thanks
>> Rajesh
>>
>>
>> On Mon, Sep 7, 2009 at 9:07 PM, Mark Abraham <Mark.Abraham at anu.edu.au
>> >wrote:
>>
>>  Naga Rajesh Tummala wrote:
>>>
>>>  Dear All,
>>>>
>>>> Two simulations runs starting from same initial configuration results in
>>>> very different energies in the first step. Both are identical
>>>> simulations,
>>>> nothing is changed.
>>>> Did anybody encounter such problem before ? If yes, can you let me know
>>>> what
>>>> to do to fix this problem.
>>>>
>>>>  That seems intrinsically impossible. Please use gmxcheck to compare
>>> your
>>> input and output files and report back.
>>>
>>> Mark
>>>
>>>  Below are the energy outputs from 2 simulation runs. First one ran
>>>
>>>> smoothly
>>>> for 5000 time steps where as second one crashed after 0th step.
>>>>
>>>>  From Run 1:
>>>>                  time:   0.00000e+00         step:             0
>>>>              Component        Energy    Av. Energy    Sum Energy
>>>>                   Bond   5.57798e+03   0.00000e+00   5.57798e+03
>>>>                  Angle   5.60521e+03   0.00000e+00   5.60521e+03
>>>>            Proper Dih.   2.45557e+03   0.00000e+00   2.45557e+03
>>>>                  LJ-14   3.58007e+03   0.00000e+00   3.58007e+03
>>>>             Coulomb-14  -9.18661e+02   0.00000e+00  -9.18661e+02
>>>>                LJ (SR)   1.03090e+05   0.00000e+00   1.03090e+05
>>>>          Disper. corr.  -1.44859e+03   0.00000e+00  -1.44859e+03
>>>>           Coulomb (SR)  -7.52008e+05   0.00000e+00  -7.52008e+05
>>>>           Coul. recip.  -7.34228e+04   0.00000e+00  -7.34228e+04
>>>>              Potential  -7.07489e+05   0.00000e+00  -7.07489e+05
>>>>            Kinetic En.   1.46808e+03   0.00000e+00   1.46808e+03
>>>>           Total Energy  -7.06021e+05   0.00000e+00  -7.06021e+05
>>>>            Temperature   4.35424e+00   0.00000e+00   4.35424e+00
>>>>         Pressure (bar)  -3.71249e+03   0.00000e+00  -3.71249e+03
>>>>                 Vir-XX   4.40454e+04   0.00000e+00   4.40454e+04
>>>>                 Vir-XY  -2.74883e+03   0.00000e+00  -2.74883e+03
>>>>                 Vir-XZ   1.05724e+03   0.00000e+00   1.05724e+03
>>>>                 Vir-YX  -2.80027e+03   0.00000e+00  -2.80027e+03
>>>>                 Vir-YY   4.67107e+04   0.00000e+00   4.67107e+04
>>>>                 Vir-YZ   2.59980e+03   0.00000e+00   2.59980e+03
>>>>                 Vir-ZX   1.09155e+03   0.00000e+00   1.09155e+03
>>>>                 Vir-ZY   2.54965e+03   0.00000e+00   2.54965e+03
>>>>                 Vir-ZZ   4.97446e+04   0.00000e+00   4.97446e+04
>>>>          Pres-XX (bar)  -3.48958e+03   0.00000e+00  -3.48958e+03
>>>>          Pres-XY (bar)   2.19836e+02   0.00000e+00   2.19836e+02
>>>>          Pres-XZ (bar)  -8.49250e+01   0.00000e+00  -8.49250e+01
>>>>          Pres-YX (bar)   2.23957e+02   0.00000e+00   2.23957e+02
>>>>          Pres-YY (bar)  -3.70321e+03   0.00000e+00  -3.70321e+03
>>>>          Pres-YZ (bar)  -2.08473e+02   0.00000e+00  -2.08473e+02
>>>>          Pres-ZX (bar)  -8.76739e+01   0.00000e+00  -8.76739e+01
>>>>          Pres-ZY (bar)  -2.04455e+02   0.00000e+00  -2.04455e+02
>>>>          Pres-ZZ (bar)  -3.94469e+03   0.00000e+00  -3.94469e+03
>>>>          #Surf*SurfTen  -2.14158e+03   0.00000e+00  -2.14158e+03
>>>>                   Mu-X  -3.94890e+03   0.00000e+00  -3.94890e+03
>>>>                   Mu-Y   8.47297e+00   0.00000e+00   8.47297e+00
>>>>                   Mu-Z   3.71283e+02   0.00000e+00   3.71283e+02
>>>>        Coul-SR:FMN-FMN   1.65804e+04   0.00000e+00   1.65804e+04
>>>>          LJ-SR:FMN-FMN  -4.43681e+03   0.00000e+00  -4.43681e+03
>>>>        Coul-14:FMN-FMN  -9.18661e+02   0.00000e+00  -9.18661e+02
>>>>          LJ-14:FMN-FMN   3.58007e+03   0.00000e+00   3.58007e+03
>>>>          *LJ-SR:FMN-CNT  -5.88918e+02   0.00000e+00  -5.88918e+02*
>>>>        Coul-SR:FMN-SOD  -8.47612e+04   0.00000e+00  -8.47612e+04
>>>>          LJ-SR:FMN-SOD   4.93246e+02   0.00000e+00   4.93246e+02
>>>>          LJ-SR:FMN-CMT  -5.58573e+02   0.00000e+00  -5.58573e+02
>>>>        Coul-SR:FMN-SOL  -2.41537e+04   0.00000e+00  -2.41537e+04
>>>>          LJ-SR:FMN-SOL  -4.60796e+03   0.00000e+00  -4.60796e+03
>>>>          LJ-SR:CNT-SOD  -1.15710e+00   0.00000e+00  -1.15710e+00
>>>>          LJ-SR:CNT-SOL  -3.05429e+02   0.00000e+00  -3.05429e+02
>>>>        Coul-SR:SOD-SOD   2.04577e+04   0.00000e+00   2.04577e+04
>>>>          LJ-SR:SOD-SOD  -2.29117e+01   0.00000e+00  -2.29117e+01
>>>>          LJ-SR:SOD-CMT  -7.17905e-01   0.00000e+00  -7.17905e-01
>>>>        Coul-SR:SOD-SOL  -1.84476e+04   0.00000e+00  -1.84476e+04
>>>>          LJ-SR:SOD-SOL   1.89181e+03   0.00000e+00   1.89181e+03
>>>>          LJ-SR:CMT-SOL  -3.13823e+02   0.00000e+00  -3.13823e+02
>>>>        Coul-SR:SOL-SOL  -6.61683e+05   0.00000e+00  -6.61683e+05
>>>>          LJ-SR:SOL-SOL   1.11541e+05   0.00000e+00   1.11541e+05
>>>>               T-System   4.35424e+00   0.00000e+00   4.35424e+00
>>>>              Xi-System   0.00000e+00   0.00000e+00   0.00000e+00
>>>>
>>>>  From Run 2:
>>>>                  time:   0.00000e+00         step:             0
>>>>              Component        Energy    Av. Energy    Sum Energy
>>>>                   Bond   5.57798e+03   0.00000e+00   5.57798e+03
>>>>                  Angle   5.60521e+03   0.00000e+00   5.60521e+03
>>>>            Proper Dih.   2.45557e+03   0.00000e+00   2.45557e+03
>>>>                  LJ-14   3.58007e+03   0.00000e+00   3.58007e+03
>>>>             Coulomb-14  -9.18661e+02   0.00000e+00  -9.18661e+02
>>>>                LJ (SR)   4.75610e+18   0.00000e+00   4.75610e+18
>>>>          Disper. corr.  -1.44859e+03   0.00000e+00  -1.44859e+03
>>>>           Coulomb (SR)  -7.52008e+05   0.00000e+00  -7.52008e+05
>>>>           Coul. recip.  -7.34228e+04   0.00000e+00  -7.34228e+04
>>>>              Potential   4.75610e+18   0.00000e+00   4.75610e+18
>>>>            Kinetic En.   1.17875e+35   0.00000e+00   1.17875e+35
>>>>           Total Energy   1.17875e+35   0.00000e+00   1.17875e+35
>>>>            Temperature   3.44094e+32   0.00000e+00   3.44094e+32
>>>>         Pressure (bar)   3.14754e+33   0.00000e+00   3.14754e+33
>>>>                 Vir-XX  -5.41605e+20   0.00000e+00  -5.41605e+20
>>>>                 Vir-XY   1.41247e+20   0.00000e+00   1.41247e+20
>>>>                 Vir-XZ   4.23707e+20   0.00000e+00   4.23707e+20
>>>>                 Vir-YX   1.41247e+20   0.00000e+00   1.41247e+20
>>>>                 Vir-YY  -1.87114e+20   0.00000e+00  -1.87114e+20
>>>>                 Vir-YZ   1.39343e+19   0.00000e+00   1.39343e+19
>>>>                 Vir-ZX   4.23708e+20   0.00000e+00   4.23708e+20
>>>>                 Vir-ZY   1.39336e+19   0.00000e+00   1.39336e+19
>>>>                 Vir-ZZ  -2.84725e+21   0.00000e+00  -2.84725e+21
>>>>          Pres-XX (bar)   2.93679e+33   0.00000e+00   2.93679e+33
>>>>          Pres-XY (bar)  -5.38913e+32   0.00000e+00  -5.38913e+32
>>>>          Pres-XZ (bar)  -2.37631e+33   0.00000e+00  -2.37631e+33
>>>>          Pres-YX (bar)  -5.38913e+32   0.00000e+00  -5.38913e+32
>>>>          Pres-YY (bar)   2.67507e+32   0.00000e+00   2.67507e+32
>>>>          Pres-YZ (bar)   6.25050e+32   0.00000e+00   6.25050e+32
>>>>          Pres-ZX (bar)  -2.37631e+33   0.00000e+00  -2.37631e+33
>>>>          Pres-ZY (bar)   6.25050e+32   0.00000e+00   6.25050e+32
>>>>          Pres-ZZ (bar)   6.23832e+33   0.00000e+00   6.23832e+33
>>>>          #Surf*SurfTen   2.85064e+34   0.00000e+00   2.85064e+34
>>>>                   Mu-X  -3.94890e+03   0.00000e+00  -3.94890e+03
>>>>                   Mu-Y   8.47297e+00   0.00000e+00   8.47297e+00
>>>>                   Mu-Z   3.71283e+02   0.00000e+00   3.71283e+02
>>>>        Coul-SR:FMN-FMN   1.65804e+04   0.00000e+00   1.65804e+04
>>>>          LJ-SR:FMN-FMN  -4.43681e+03   0.00000e+00  -4.43681e+03
>>>>        Coul-14:FMN-FMN  -9.18661e+02   0.00000e+00  -9.18661e+02
>>>>          LJ-14:FMN-FMN   3.58007e+03   0.00000e+00   3.58007e+03
>>>>        *  LJ-SR:FMN-CNT   2.06986e+18   0.00000e+00   2.06986e+18*
>>>>        Coul-SR:FMN-SOD  -8.47612e+04   0.00000e+00  -8.47612e+04
>>>>          LJ-SR:FMN-SOD   4.93246e+02   0.00000e+00   4.93246e+02
>>>>          LJ-SR:FMN-CMT   1.26082e+18   0.00000e+00   1.26082e+18
>>>>        Coul-SR:FMN-SOL  -2.41537e+04   0.00000e+00  -2.41537e+04
>>>>          LJ-SR:FMN-SOL  -4.60796e+03   0.00000e+00  -4.60796e+03
>>>>          LJ-SR:CNT-SOD   3.29985e+12   0.00000e+00   3.29985e+12
>>>>          LJ-SR:CNT-SOL   1.42541e+18   0.00000e+00   1.42541e+18
>>>>        Coul-SR:SOD-SOD   2.04577e+04   0.00000e+00   2.04577e+04
>>>>          LJ-SR:SOD-SOD  -2.29117e+01   0.00000e+00  -2.29117e+01
>>>>          LJ-SR:SOD-CMT   5.87209e+11   0.00000e+00   5.87209e+11
>>>>        Coul-SR:SOD-SOL  -1.84476e+04   0.00000e+00  -1.84476e+04
>>>>          LJ-SR:SOD-SOL   1.89181e+03   0.00000e+00   1.89181e+03
>>>>          LJ-SR:CMT-SOL  -3.13899e+02   0.00000e+00  -3.13899e+02
>>>>        Coul-SR:SOL-SOL  -6.61683e+05   0.00000e+00  -6.61683e+05
>>>>          LJ-SR:SOL-SOL   1.11541e+05   0.00000e+00   1.11541e+05
>>>>               T-System   3.44094e+32   0.00000e+00   3.44094e+32
>>>>              Xi-System   0.00000e+00   0.00000e+00   0.00000e+00
>>>>
>>>> Thanks a  lot
>>>> Any help is greatly appreciated.
>>>>
>>>> Thanks
>>>> Rajesh
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
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