Man page - gmx-convert-tpr(1)

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Manual

GMX-CONVERT-TPR

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
COPYRIGHT

NAME

gmx-convert-tpr - Make a modified run-input file

SYNOPSIS

gmx convert-tpr [ -s [<.tpr/.gro/...>] ] [ -n [<.ndx>] ]
[ -o [<.tpr/.gro/...>] ] [ -extend <time> ] [ -until <time> ]
[ -nsteps <int> ] [ -[no]generate_velocities ]
[ -velocity_temp <real> ] [ -velocity_seed <int> ]

DESCRIPTION

gmx convert-tpr can edit run input files in three ways.

1. by modifying the number of steps in a run input file with options -extend , -until or -nsteps (nsteps=-1 means unlimited number of steps)

2. by creating a .tpx file for a subset of your original tpx file, which is useful when you want to remove the solvent from your .tpx file, or when you want to make e.g. a pure Calpha .tpx file. Note that you may need to use -nsteps -1 (or similar) to get this to work. WARNING: this .tpx file is not fully functional .

3. by setting the charges of a specified group to zero. This is useful when doing free energy estimates using the LIE (Linear Interaction Energy) method.

OPTIONS

Options to specify input files:
-s [<.tpr/.gro/...>] (topol.tpr)

Run input file to modify: tpr gro g96 pdb brk ent

-n [<.ndx>] (index.ndx) (Optional)

File containing additional index groups

Options to specify output files:
-o [<.tpr/.gro/...>] (tprout.tpr) (Optional)

Generated modified run input file: tpr gro g96 pdb brk ent

Other options:
-extend <time> (0)

Extend runtime by this amount (ps)

-until <time> (0)

Extend runtime until this ending time (ps)

-nsteps <int> (0)

Change the number of steps remaining to be made

-[no]generate_velocities (no)

Reassign velocities, using a generated seed unless one is explicitly set

-velocity_temp <real> (300)

Temperature to use when generating velocities

-velocity_seed <int> (-1)

Random seed for velocities. If value is -1, a new one is generated

SEE ALSO

gmx(1)

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COPYRIGHT

2025, GROMACS development team