# Running JULES from **URL:** https://cms-helpdesk.ncas.ac.uk/t/running-jules-from/1455 **Category:** JULES **Created:** [21 June 2024 11:39 UTC](https://cms-helpdesk.ncas.ac.uk/t/running-jules-from/1455 "2024-06-21T11:39:37Z") **Posts on this page:** 1 **Showing post:** 7
### Author: ![david.livings](https://avatars.discourse-cdn.com/v4/letter/d/d07c76/32.png) [@david.livings](https://cms-helpdesk.ncas.ac.uk/u/david.livings) #### Post date: [28 June 2024 17:08 UTC](https://cms-helpdesk.ncas.ac.uk/t/running-jules-from/1455/7 "2024-06-28T17:08:11Z")
Hi Maria Paula I think I understand what is going on. The problem is with the specification of the driving data in namelist `jules_drive` in `~/roses/u-dh119/app/jules/rose-app.conf`. The namelist variable `file` points to `/gws/nopw/j04/mohc_shared/isimip-jules/isimip3a/obsclim/20CRv3-ERA5/drive_files.dat`. This file contains a list of files of driving data together with the times of the first data in each file. The FATAL ERROR is occurring because the start time of the first file (in 1801) disagrees with the time specified by the namelist variable `data_start` (in 1993). One solution would be to create your own cut-down version of the `drive_files.dat` file starting in 1991 and to modify the `file` namelist variable to point to it. You would have to start your experiment in 1991 instead of 1993 and you might also have to alter `drive_nfiles_hist`. There might be neater solutions. David --- _[View the full topic](https://cms-helpdesk.ncas.ac.uk/t/running-jules-from/1455)._