# UKESM1 failing to restart **URL:** \ **Category:** Unified Model\ **Tags:** NEXCS\ **Created:** [7 May 2021 15:28 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61 "2021-05-07T15:28:07Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![lmarshall](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lmarshall](https://cms-helpdesk.ncas.ac.uk/u/lmarshall)\ **Post date:** [7 May 2021 15:28 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/1 "2021-05-07T15:28:08Z")
Hello, I’m trying to restart a few UKESM runs (e.g. u-cb380, u-cd124) on NEXCS, which I think stopped due to maintenance, but they are failing on the coupled task: [SUBPROCESS ERROR] \ Traceback (most recent call last): File “./link\_drivers”, line 205, in envinsts, launchcmds = \_run\_drivers(common\_envars, mode) File “./link\_drivers”, line 69, in \_run\_drivers mode) File “/working/d03/lamar/cylc- run/u-cd124/work/17940701T0000Z/coupled/nemo\_driver.py”, line 699, in run\_driver exe\_envar = \_setup\_executable(common\_envar) File “/working/d03/lamar/cylc- run/u-cd124/work/17940701T0000Z/coupled/nemo\_driver.py”, line 359, in \_setup\_executable nemo\_first\_step = int(re.findall(r’.+=(.+),’, first\_step\_val)[0]) IndexError: list index out of range [FAIL] run\_model # return-code=1 2021-05-07T13:41:30Z CRITICAL - failed/EXIT Following #3385 I tried deleting the last directory under /work and restarting but no success. Any help much appreciated, Thank you, Lauren ---
**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\ **Post date:** [10 May 2021 07:48 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/2 "2021-05-10T07:48:09Z")
Hi Lauren, I’ve found this error listed on one of the Met Office’s known errors webpages: [Index out of range in nemo driver](https://code.metoffice.gov.uk/trac/moci/wiki/tips_CRgeneral#Unexpectederror:IndexError:listindexoutofrangeinnemo_driver.py) It looks like the `namelist_cfg` file is indeed missing from the previous cycle’s work directory. Could you try copying it back into place as per the instructions and see if that fixes the problem. Cheers, Ros. ---
**Author:** ![lmarshall](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lmarshall](https://cms-helpdesk.ncas.ac.uk/u/lmarshall)\ **Post date:** [10 May 2021 09:10 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/4 "2021-05-10T09:10:08Z")
Hi Ros, Sorry for missing that! Yes, that’s fixed it. Thanks very much. Lauren ---
**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\ **Post date:** [10 May 2021 09:18 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/5 "2021-05-10T09:18:00Z")
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**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\ **Post date:** [14 May 2021 11:12 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/6 "2021-05-14T11:12:05Z")
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**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\ **Post date:** [16 May 2021 17:21 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/7 "2021-05-16T17:21:17Z")
5 posts were split to a new topic: [Postproc\_cice missing file for seasonal mean](https://cms-helpdesk.ncas.ac.uk/t/postproc-cice-missing-file-for-seasonal-mean/68) ---
**Author:** ![RosalynHatcher](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/rosalynhatcher/32/11_2.png) [@RosalynHatcher](https://cms-helpdesk.ncas.ac.uk/u/RosalynHatcher)\ **Post date:** [16 May 2021 17:22 UTC](https://cms-helpdesk.ncas.ac.uk/t/ukesm1-failing-to-restart/61/8 "2021-05-16T17:22:45Z")