[gmx-users] Getting error using gmx trjconv

2018-10-08 Thread Saikat Pal
Dear all,I am getting this kind of error :

Command line:
  gmx trjconv -s 148d-wat-0-reduce-oct_GMX-1.gro -f b.tng -o c.tng -fit 
rot+trans -n test-o.ndx

Will write tng: Trajectory file (tng format)

WARNING: Masses and atomic (Van der Waals) radii will be guessed
 based on residue and atom names, since they could not be
 definitively assigned from the information in your input
 files. These guessed numbers might deviate from the mass
 and radius of the atom type. Please check the output
 files if necessary.


WARNING: If there are molecules in the input trajectory file
 that are broken across periodic boundaries, they
 cannot be made whole (or treated as whole) without
 you providing a run input file.

Select group for least squares fit
Group 0 (    URE) has  4000 elements
There is one group in the index
Select group for output
Group 0 (    URE) has  4000 elements
There is one group in the index
Reading frame   0 time 1035500.000   
Precision of b.tng is 0.001 (nm)

---
Program: gmx trjconv, version 2018.3
Source file: src/gromacs/gmxana/gmx_trjconv.cpp (line 1350)

Fatal error:
Index[3498] 4001 is larger than the number of atoms in the
trajectory file (4000). There is a mismatch in the contents
of your -f, -s and/or -n files.



Thanks and Regards,
Saikat Pal



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Re: [gmx-users] RDF

2017-07-12 Thread Saikat Pal
Dear Vidya.R
Its very difficult to answer this question.It depends on your system .If you 
run more time of your system, RDF will be more smooth

Saikat Pal
IIT GUWAHATI



On Wednesday 12 July 2017, 10:02:30 AM IST, Vidya R <vidyadevi2...@gmail.com> 
wrote:

Hi,

I want to calculate RDF of my organic molecule with a solvent.

What should be the duration of my simulation?

Is 100 ps enough?


Thanks,
Vidya.R
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[gmx-users] How to convert AMBER trajectory to Gromacs trajectory

2017-06-26 Thread Saikat Pal
Dear all,


I have converted Amber trajectory (.mdcrd ) to Gromacs trajectory (.trr) using 
Amber 14 cpptraj. But Now I want to convert .trr to .xtc format. I have used 
this command:  trjconv -s output1.pdb -f qdna-1.trr -o md_0_1.xtc -pbc none -ur 
compact
It shows:
Last frame -1 time    0.000   

Setting output precision to 0.001 (nm)

WARNING no output, last frame read at t=0


gcq#131: "You Fill Your Space So Sweet" (F. Apple)


output1.pdb=generated by cpptraj


please help me out. I am not much familiar with gromacs.I am using gromacs 
4.6.7.
Thanks and regards,
Saikat
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