[gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Hsin-Lin Chiang
Hi, I want to run mdrun -nt 12 on our cluster. When I execute, grompp -f test.mdp -o test.tpr -c ../3eq/eq.gro -t ../3eq/eq.trr -p ../initial/insulin.top -n ../initial/index.ndx I got the message, Estimate for the relative computational load of the PME mesh part: 1.00 NOTE 1 [file test.mdp]:

Re: [gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Justin A. Lemkul
Hsin-Lin Chiang wrote: **Hi, I want to run mdrun -nt 12 on our cluster. When I execute, grompp -f test.mdp -o test.tpr -c ../3eq/eq.gro -t ../3eq/eq.trr -p ../initial/insulin.top -n ../initial/index.ndx I got the message, Estimate for the relative computational load of the PME mesh part:

[gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Hsin-Lin Chiang
Sorry for the confusing symbol. I tried to change it in this new mail. Hi, I want to run mdrun -nt 12 on our cluster. When I execute, grompp -f test.mdp -o test.tpr -c ../3eq/eq.gro -t ../3eq/eq.trr -p ../initial/insulin.top -n ../initial/index.ndx I got the message, Estimate for the

[gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Hsin-Lin Chiang
If the simulation is even stable, it will be horribly inaccurate. 12 nm cutoffs are unheard of and 2-nm grid spacing is about 20 times too large. Without seeing the original .mdp file that gave the high PME load, and without a further description about how large the system is (number of

[gmx-users] Warning and Notes in Grompp for minimization

2011-08-20 Thread meisam valizadeh kiamahalleh
Dear gmx-users Good day to you I have a system including carbon nanotube (1260atoms) and 18 Cisplatin molecules (198atoms) =1458atoms. I have created the topology file of the system and now I would like to run minimization on this system. The content of my mdp file is as below; define

Re: [gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Justin A. Lemkul
Hsin-Lin Chiang wrote: If the simulation is even stable, it will be horribly inaccurate. 12 nm cutoffs are unheard of and 2-nm grid spacing is about 20 times too large. Without seeing the original .mdp file that gave the high PME load, and without a further description about how large the

Re: [gmx-users] Warning and Notes in Grompp for minimization

2011-08-20 Thread Justin A. Lemkul
meisam valizadeh kiamahalleh wrote: Dear gmx-users Good day to you I have a system including carbon nanotube (1260atoms) and 18 Cisplatin molecules (198atoms) =1458atoms. I have created the topology file of the system and now I would like to run minimization on this system. The content of

[gmx-users] problem with g_density -center

2011-08-20 Thread Sanku M
Hi,   I am trying to calculate the density profile of  head group of bilayer normal to z direction using gromacs 4.0.7. I was trying to center the density profile about dx/2.dy/2,0 . But, I am finding problem with using center option. I find using -center option does not shift the bilayer to

Re: [gmx-users] problem with g_density -center

2011-08-20 Thread Justin A. Lemkul
Sanku M wrote: Hi, I am trying to calculate the density profile of head group of bilayer normal to z direction using gromacs 4.0.7. I was trying to center the density profile about dx/2.dy/2,0 . But, I am finding problem with using center option. I find using -center option does not

[gmx-users] problem with g_density -center

2011-08-20 Thread chris . neale
g_density is not compatible with constant pressure simulations. You must modify it to construct the bins outward from the bilayer center when doing NPT: http://lists.gromacs.org/pipermail/gmx-users/2010-November/055651.html Further, trjconv -center is misleading. I actually lost a lot of

Re: [gmx-users] problem with g_density -center

2011-08-20 Thread wibke . sudholt
Dear Email Sender, Thank you very much for contacting me! Unfortunately, I am not available in the office at the moment and cannot respond to your email. I will be able to handle your request starting again Monday, August 22, 2011. For all questions about CloudBroker and the CloudBroker

[gmx-users] wibke.sudholt spam needs to stop

2011-08-20 Thread chris . neale
That's 9 times in the last 20 days that a single user has hit the list with an auto-reply that seems a lot like an advertisement. Can somebody please ban this user? The most recent example: http://lists.gromacs.org/pipermail/gmx-users/2011-August/063991.html -- gmx-users mailing list

Re: [gmx-users] NPT - density off

2011-08-20 Thread Mark Abraham
On 20/08/2011 8:02 AM, Elisabeth wrote: Dear experts, I am intending to calculate the equilibrium density of a pure hydrocarbon at different pressures , at 425 K. The normal boiling point of the liquid is around 350 K. For pressures below 100 bar densities I am getting from NPT is in

Re: [gmx-users] NPT - density off

2011-08-20 Thread Elisabeth
On 20 August 2011 21:20, Mark Abraham mark.abra...@anu.edu.au wrote: On 20/08/2011 8:02 AM, Elisabeth wrote: Dear experts, I am intending to calculate the equilibrium density of a pure hydrocarbon at different pressures , at 425 K. The normal boiling point of the liquid is around 350 K.

[gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Hsin-Lin Chiang
Hi, Justin Sorry for the unclear message. My box vector in .gro file are 44.22834#160; 44.22834#160; 44.22834 and the number of atoms is 20171 The output of grompp is shown below, I don't know if it is enough and I'm sorry I don't know how should I do after you reply. Could you please give me

Re: [gmx-users] increasing cut-off and PME grid spacing

2011-08-20 Thread Justin A. Lemkul
Hsin-Lin Chiang wrote: Hi, Justin Sorry for the unclear message. My box vector in .gro file are 44.22834 44.22834 44.22834 and the number of atoms is 20171 You've set an unreasonably large box, as I expected. The box should be set in nm, not Angstrom. 20171 atoms is a fairly small

Re: [gmx-users] NPT - density off

2011-08-20 Thread Mark Abraham
On 21/08/2011 2:08 PM, Elisabeth wrote: On 20 August 2011 21:20, Mark Abraham mark.abra...@anu.edu.au mailto:mark.abra...@anu.edu.au wrote: On 20/08/2011 8:02 AM, Elisabeth wrote: Dear experts, I am intending to calculate the equilibrium density of a pure hydrocarbon at