# Fatal error: Index\[9411\] 92818 is larger than the number of atoms in the trajectory file (9591) **URL:** \ **Category:** User discussions\ **Created:** [October 27, 2024, 11:05pm UTC](https://gromacs.bioexcel.eu/t/fatal-error-index-9411-92818-is-larger-than-the-number-of-atoms-in-the-trajectory-file-9591/10425 "2024-10-27T23:05:31Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Tang](https://avatars.discourse-cdn.com/v4/letter/t/e8c25b/32.png) [@Tang](https://gromacs.bioexcel.eu/u/Tang)\ **Post date:** [October 27, 2024, 11:05pm UTC](https://gromacs.bioexcel.eu/t/fatal-error-index-9411-92818-is-larger-than-the-number-of-atoms-in-the-trajectory-file-9591/10425/1 "2024-10-27T23:05:31Z")
GROMACS version: Gromacs 2024 GROMACS modification: No Here post your question : Gromacs reported the following error: Fatal error: Index[9411] 92818 is larger than the number of atoms in the trajectory file (9591). There is a mismatch in the contents of your -f, -s and/or -n files. ## For more information and tips for troubleshooting, please check the GROMACS website at [Common errors when using GROMACS - GROMACS 2025.4 documentation](https://manual.gromacs.org/current/user-guide/run-time-errors.html) Note that major changes are planned in future for trjconv, to improve usability and utility. Select group for centering Selected 18: ‘center’ Select group for output Selected 19: ‘output’ ---
**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:** [October 28, 2024, 6:26am UTC](https://gromacs.bioexcel.eu/t/fatal-error-index-9411-92818-is-larger-than-the-number-of-atoms-in-the-trajectory-file-9591/10425/2 "2024-10-28T06:26:21Z")
Have you checked the numbers in your index file and compared to your gro file or topology?