# Dump Trajectories with Wrapped Boundaries

**URL:** <https://gromacs.bioexcel.eu/t/dump-trajectories-with-wrapped-boundaries/4807>\
**Category:** User discussions\
**Tags:** mdrun\
**Created:** [September 17, 2022, 12:37pm UTC](https://gromacs.bioexcel.eu/t/dump-trajectories-with-wrapped-boundaries/4807 "2022-09-17T12:37:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![quantum](https://avatars.discourse-cdn.com/v4/letter/q/b9e5f3/32.png) [@quantum](https://gromacs.bioexcel.eu/u/quantum)\
**Post date:** [September 17, 2022, 12:37pm UTC](https://gromacs.bioexcel.eu/t/dump-trajectories-with-wrapped-boundaries/4807/1 "2022-09-17T12:37:05Z")

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GROMACS version: 2021  
GROMACS modification: Yes/No

Is there any way to dump trajectories from mdrun with wrapped boundaries? The trjconv does work but my trajectories are in TB size, so I don’t want to post process the trajectories after the simulation. The simulations are very fast to run, so I will prefer to get the trajectories wrapped on the boundaries.

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**Author:** ![hess](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/hess/32/416_2.png) [@hess](https://gromacs.bioexcel.eu/u/hess)\
**Post date:** [September 23, 2022, 10:47am UTC](https://gromacs.bioexcel.eu/t/dump-trajectories-with-wrapped-boundaries/4807/2 "2022-09-23T10:47:06Z")

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What do you mean with “wrapped on the boundary”?

But the answer is likely no, mdrun has no options for setting PBC images for ouput.