# Error while running writing the topology

**URL:** https://gromacs.bioexcel.eu/t/error-while-running-writing-the-topology/6438
**Category:** User discussions
**Tags:** forcefield, analysis-tools, pdb2gmx, mdp-parameters, mdrun
**Created:** [May 18, 2023, 10:54am UTC](https://gromacs.bioexcel.eu/t/error-while-running-writing-the-topology/6438 "2023-05-18T10:54:58Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)
#### Post date: [June 18, 2024, 7:23am UTC](https://gromacs.bioexcel.eu/t/error-while-running-writing-the-topology/6438/3 "2024-06-18T07:23:17Z")

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Please, don’t ask the same question in multiple threads. Wait a few days to see if you get any answers in the first thread you posted: [Fatal error while doing Protein-ligand simulation using GROMACS 2023 - #5 by dlakhan](https://gromacs.bioexcel.eu/t/fatal-error-while-doing-protein-ligand-simulation-using-gromacs-2023/7515/5).

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