DOKK / manpages / debian 12 / gromacs-data / gmx-convert-tpr.1.en
GMX-CONVERT-TPR(1) GROMACS GMX-CONVERT-TPR(1)

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

gmx convert-tpr [-s [<.tpr/.gro/...>]] [-n [<.ndx>]]


             [-o [<.tpr/.gro/...>]] [-extend <time>] [-until <time>]


             [-nsteps <int>]


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 to specify input files:

Run input file to modify: tpr gro g96 pdb brk ent
File containing additional index groups

Options to specify output files:

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

Other options:

Extend runtime by this amount (ps)
Extend runtime until this ending time (ps)
Change the number of steps remaining to be made

gmx(1)

More information about GROMACS is available at <http://www.gromacs.org/>.

2023, GROMACS development team

February 3, 2023 2022.5