Thanks for the advice
In my case no problem is coming while running the grompp, no warning is
coming. i could able to generate .tpr file without any error.
problem cames only while running the minimization using the .tpr file

For convenience, as mention earlier, following was the problem :
...................
Warning: 1-4 interaction between 1 and 9 at distance 8.443 which is larger
than the 1-4 table size 1.000 nm
These are ignored for the rest of the simulation
This usually means your system is exploding,
if not, you should increase table-extension in your mdp file

...................
could you please suggest me some way out for this.

Thanks

With Regards
Gurpreet


On 7/4/07, David van der Spoel <[EMAIL PROTECTED]> wrote:

Mark Abraham wrote:
>> Thanks Mark for your advice
>>
>>  I tried to run the simulation even by removing all the restraints as
you
>> told but the same problem was coming.
>> In your  second reply you asked me to check the topology file. I have a
>> doubt in that, actually what are the things i should look at in the
>> topology
>> file. I have seen my topology file and the related .itp files also but
i
>> did
>> not find anything unusual in that.
>>
>> Following are the contents of my Topology file:
>>
>> ; Include forcefield parameters
>> #include "ffG43a1.itp"
>>
>> ; Include chain topologies
>> #include "aquapomut_grom_A.itp"
>> #include "aquapomut_grom_B.itp"
>>
>> ; Include water topology
>> #include "spce.itp"
>>
>> #ifdef POSRES_WATER
>> ; Position restraint for each water oxygen
>> [ position_restraints ]
>> ;  i funct       fcx        fcy        fcz
>>    1    1       1000       1000       1000
>> #endif
>>
>> ; Include generic topology for ions
>> #include "ions.itp"
>>
>> [ system ]
>> ; Name
>> Protein in water
>>
>> [ molecules ]
>> ; Compound        #mols
>> Protein_A           1
>> Protein_B           1
>> SOL                71
>> CL-                 6
>> SOL             14825
>
> Two regions of SOL doesn't sound like a good idea, but I won't swear
it's
> the problem.

this is why I suggested grompp -maxwarn 0, because it will detect the
inconsistencies in names and tell you to fix it.


>
> Mark
>
>
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--
David van der Spoel, Ph.D.
Molec. Biophys. group, Dept. of Cell & Molec. Biol., Uppsala University.
Box 596, 75124 Uppsala, Sweden. Phone:  +46184714205. Fax: +4618511755.
[EMAIL PROTECTED]    [EMAIL PROTECTED]   http://folding.bmc.uu.se
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