# Unified Model **URL:** https://cms-helpdesk.ncas.ac.uk/c/unified-model/5.md?page=2 [Latest](https://cms-helpdesk.ncas.ac.uk/latest.md) · [Categories](https://cms-helpdesk.ncas.ac.uk/categories.md) · [Tags](https://cms-helpdesk.ncas.ac.uk/tags.md) **Page:** 3 --- ## [Sudden NaN in tracers during u-dv344 piControl run](https://cms-helpdesk.ncas.ac.uk/t/sudden-nan-in-tracers-during-u-dv344-picontrol-run/1963)
**Author:** [@an25872](https://cms-helpdesk.ncas.ac.uk/u/an25872)\ **Replies:** 1\ **Last updated:** [22 January 2026 17:53 UTC](https://cms-helpdesk.ncas.ac.uk/t/sudden-nan-in-tracers-during-u-dv344-picontrol-run/1963 "2026-01-22T17:53:51Z")
Hi NCAS, I am currently setting up a GC5-central piControl suite on MONSOON3 (u-dv344), as a preparation for later paleoclimate simulations. During the coupled run, I observed that NaN in UKCA tracers suddenly emerge w… --- ## [Custom domain profile](https://cms-helpdesk.ncas.ac.uk/t/custom-domain-profile/1980)
**Author:** [@isangha](https://cms-helpdesk.ncas.ac.uk/u/isangha)\ **Replies:** 5\ **Last updated:** [22 January 2026 10:47 UTC](https://cms-helpdesk.ncas.ac.uk/t/custom-domain-profile/1980 "2026-01-22T10:47:28Z")
Hello! I am trying to define a custom domain profile to output STASH only between 15 km and 45 km to help keep the file sizes reasonable while outputting hourly data. I have defined the domain profile as shown in the sc… --- ## [Write output at custom times?](https://cms-helpdesk.ncas.ac.uk/t/write-output-at-custom-times/1953)
**Author:** [@miclen](https://cms-helpdesk.ncas.ac.uk/u/miclen)\ **Replies:** 10\ **Last updated:** [18 January 2026 14:32 UTC](https://cms-helpdesk.ncas.ac.uk/t/write-output-at-custom-times/1953 "2026-01-18T14:32:48Z")
Hello, I have a suite (u-dv923) where I’d like to customize the timesteps when the output is written. I’d like to keep the standard hourly output, but also add a few customized times (down to the second) for output, is t… --- ## [Error in buffin errorCode](https://cms-helpdesk.ncas.ac.uk/t/error-in-buffin-errorcode/1945)
**Author:** [@MYoshioka](https://cms-helpdesk.ncas.ac.uk/u/MYoshioka)\ **Replies:** 1\ **Last updated:** [15 January 2026 11:19 UTC](https://cms-helpdesk.ncas.ac.uk/t/error-in-buffin-errorcode/1945 "2026-01-15T11:19:21Z")
Monsoon3 My UM vn13.9 UKESM1.1 global AMIP suite, u-dv727, is a suite I tried to rebuilt the u-dv077 that I am asking about in the other ticket. It ran for 6 month (run2) and then failed with UPANCIL problem. This needs… --- ## [UM-UKCA run error](https://cms-helpdesk.ncas.ac.uk/t/um-ukca-run-error/1939)
**Author:** [@emxin](https://cms-helpdesk.ncas.ac.uk/u/emxin)\ **Replies:** 10\ **Last updated:** [15 January 2026 10:45 UTC](https://cms-helpdesk.ncas.ac.uk/t/um-ukca-run-error/1939 "2026-01-15T10:45:00Z")
Hi CMS, My user ID is emxin, and the suite I am working on is u-dv236. I encountered a problem when I tried to add a new sea-salt aerosol Aitken mode to the UM-UKCA, following previous work. Since I could not directly u… --- ## [Stash code outputs in UKESM](https://cms-helpdesk.ncas.ac.uk/t/stash-code-outputs-in-ukesm/1952)
**Author:** [@emxin](https://cms-helpdesk.ncas.ac.uk/u/emxin)\ **Replies:** 5\ **Last updated:** [14 January 2026 11:44 UTC](https://cms-helpdesk.ncas.ac.uk/t/stash-code-outputs-in-ukesm/1952 "2026-01-14T11:44:32Z")
Hi there, I added a new species, Br2 (34261), along with some diagnoses to the UM-UKCA model (vn11.0). The model ran well (suite u-dv236). However, when I checked the outputs, I found that the added species were shown a… --- ## [BiCGstab error at the beginning of simulation](https://cms-helpdesk.ncas.ac.uk/t/bicgstab-error-at-the-beginning-of-simulation/1934)
**Author:** [@MYoshioka](https://cms-helpdesk.ncas.ac.uk/u/MYoshioka)\ **Replies:** 6\ **Last updated:** [5 January 2026 10:57 UTC](https://cms-helpdesk.ncas.ac.uk/t/bicgstab-error-at-the-beginning-of-simulation/1934 "2026-01-05T10:57:52Z")
Monsoon3 My UM vn13.9 UKESM1.1 global AMIP suite, u-dv077, completed a one-year simulation without a problem (finally). Now I copied it and created u-dv258. I removed the aviation emissions that I added to ukca\_em\_file … --- ## [JASMIN Cylc 8 slurm tasks](https://cms-helpdesk.ncas.ac.uk/t/jasmin-cylc-8-slurm-tasks/1946)
**Author:** [@douglowe](https://cms-helpdesk.ncas.ac.uk/u/douglowe)\ **Replies:** 2\ **Last updated:** [4 January 2026 17:54 UTC](https://cms-helpdesk.ncas.ac.uk/t/jasmin-cylc-8-slurm-tasks/1946 "2026-01-04T17:54:14Z")
I would like to include slurm tasks in my UM workflow, but it looks like the cylc configuration on PUMA does not include similar configuration options for JASMIN (which only has the ‘sci-vm’ option for background jobs) a… --- ## [Failed extracting ozone fields in the postproc of GC5 model on MONSOON3](https://cms-helpdesk.ncas.ac.uk/t/failed-extracting-ozone-fields-in-the-postproc-of-gc5-model-on-monsoon3/1944)
**Author:** [@an25872](https://cms-helpdesk.ncas.ac.uk/u/an25872)\ **Replies:** 0\ **Last updated:** [22 December 2025 18:04 UTC](https://cms-helpdesk.ncas.ac.uk/t/failed-extracting-ozone-fields-in-the-postproc-of-gc5-model-on-monsoon3/1944 "2025-12-22T18:04:35Z")
Hi, I am trying to set up a GC5-central piControl on MONSOON3 (u-dv344), as a preparation step for later configuring paleoclimate suites. I encounter the following error during the postproc task of this suite: \[WARN\] … --- ## [2014 timeslice using Archer2](https://cms-helpdesk.ncas.ac.uk/t/2014-timeslice-using-archer2/1938)
**Author:** [@hannahbryant](https://cms-helpdesk.ncas.ac.uk/u/hannahbryant)\ **Replies:** 9\ **Last updated:** [11 December 2025 14:36 UTC](https://cms-helpdesk.ncas.ac.uk/t/2014-timeslice-using-archer2/1938 "2025-12-11T14:36:01Z")
Hi, I’d like to run a 2014 timeslice run but I am struggling to find some of the files (DMS, CHL, canopy height, land area fraction, sst, seaice) on ARCHER2. Previous jobs point to a folder within the model\_derived anci… --- ## [Changing SST initial conditions in fully coupled model](https://cms-helpdesk.ncas.ac.uk/t/changing-sst-initial-conditions-in-fully-coupled-model/1888)
**Author:** [@c.j.r.williams](https://cms-helpdesk.ncas.ac.uk/u/c.j.r.williams)\ **Replies:** 5\ **Last updated:** [5 December 2025 14:01 UTC](https://cms-helpdesk.ncas.ac.uk/t/changing-sst-initial-conditions-in-fully-coupled-model/1888 "2025-12-05T14:01:24Z")
Hi, Sorry to bother you, but I have a question regarding the sea surface temperature (SST) initial conditions in a standard fully coupled GC31 suite (e.g. u-df570, which is a copy of the official CMIP6 preindustrial con… --- ## [Nudged run for year 2012](https://cms-helpdesk.ncas.ac.uk/t/nudged-run-for-year-2012/1894)
**Author:** [@emxin](https://cms-helpdesk.ncas.ac.uk/u/emxin)\ **Replies:** 4\ **Last updated:** [5 December 2025 09:57 UTC](https://cms-helpdesk.ncas.ac.uk/t/nudged-run-for-year-2012/1894 "2025-12-05T09:57:32Z")
Hi CMS: I copied a working suite, which works well for year 2020 (nudged), to u-dv068, where I wanted to make a nudged UKCA run for year 2012. Then I changed both SST and SEAICE files from the previous files to new ones… --- ## [Crash in downscaling suite](https://cms-helpdesk.ncas.ac.uk/t/crash-in-downscaling-suite/1878)
**Author:** [@Emanuele\_Gentile](https://cms-helpdesk.ncas.ac.uk/u/Emanuele_Gentile)\ **Replies:** 1\ **Last updated:** [24 November 2025 10:09 UTC](https://cms-helpdesk.ncas.ac.uk/t/crash-in-downscaling-suite/1878 "2025-11-24T10:09:33Z")
Hi Ros, This is Ben path /home/n02/n02/bharvey/cylc-run/u-dq099\_cm655\_dd441\_19580216-P\_uk-02 And my own /home/n02/n02/egentile/cylc-run/u-dq099\_cm655\_dd441\_19580216-P\_naew-02 We got a similar crash despite us runnin… --- ## [Pptransfer/globus](https://cms-helpdesk.ncas.ac.uk/t/pptransfer-globus/1871)
**Author:** [@SimonTett](https://cms-helpdesk.ncas.ac.uk/u/SimonTett)\ **Replies:** 5\ **Last updated:** [15 November 2025 18:45 UTC](https://cms-helpdesk.ncas.ac.uk/t/pptransfer-globus/1871 "2025-11-15T18:45:59Z")
Hi, Globus transfers are running very slowly since about 11ish today. I have 10 simulations running in, I think, scratch though the data (on archer2) is being successfully archived to /mnt/lustre/a2fs-work2/work/n02/sh… --- ## [Number of fields exceeds reserved headers and nudging?](https://cms-helpdesk.ncas.ac.uk/t/number-of-fields-exceeds-reserved-headers-and-nudging/1873)
**Author:** [@MYoshioka](https://cms-helpdesk.ncas.ac.uk/u/MYoshioka)\ **Replies:** 2\ **Last updated:** [14 November 2025 16:46 UTC](https://cms-helpdesk.ncas.ac.uk/t/number-of-fields-exceeds-reserved-headers-and-nudging/1873 "2025-11-14T16:46:30Z")
Monsoon3 #vn13.9 #Nudging Hi, I’m getting this error with my suite u-du347. ? Error from routine: STWORK ? Error message: STWORK: Number of fields exceeds reserved headers for unit 20 I see some of the tickets as… --- ## [Segmentation fault (core dumped)](https://cms-helpdesk.ncas.ac.uk/t/segmentation-fault-core-dumped/1874)
**Author:** [@hannahbryant](https://cms-helpdesk.ncas.ac.uk/u/hannahbryant)\ **Replies:** 0\ **Last updated:** [14 November 2025 14:34 UTC](https://cms-helpdesk.ncas.ac.uk/t/segmentation-fault-core-dumped/1874 "2025-11-14T14:34:42Z")
Hi CMS team, My run of u-dq440 is failing in the atmos\_main stage with a segmentation fault (core dumped): srun: error: nid005245: tasks 320-383: Segmentation fault srun: launch/slurm: \_step\_signal: Terminating StepId… --- ## [Atmos\_main failing after 25 days in one month run](https://cms-helpdesk.ncas.ac.uk/t/atmos-main-failing-after-25-days-in-one-month-run/1863)
**Author:** [@tanusri](https://cms-helpdesk.ncas.ac.uk/u/tanusri)\ **Replies:** 13\ **Last updated:** [10 November 2025 13:21 UTC](https://cms-helpdesk.ncas.ac.uk/t/atmos-main-failing-after-25-days-in-one-month-run/1863 "2025-11-10T13:21:15Z")
Hi, I am running the suite u-ds446 on Monsoon3. The model runs successfully for about 20 days, but after 25 days within a month, it stops producing data. The job Atmos\_main fails without any visible error message. Coul… --- ## [Recon failure with tile\_map\_ids](https://cms-helpdesk.ncas.ac.uk/t/recon-failure-with-tile-map-ids/1853)
**Author:** [@MYoshioka](https://cms-helpdesk.ncas.ac.uk/u/MYoshioka)\ **Replies:** 5\ **Last updated:** [4 November 2025 15:12 UTC](https://cms-helpdesk.ncas.ac.uk/t/recon-failure-with-tile-map-ids/1853 "2025-11-04T15:12:16Z")
Hi. I copied u-dq607 and created u-ds461. I thought it ran fine although it was several weeks ago. These are UM vn13.8 global suites. Now, based on this I’ve been trying to create a suite for future simulations. In u-d… --- ## [Model failures](https://cms-helpdesk.ncas.ac.uk/t/model-failures/1852)
**Author:** [@SimonTett](https://cms-helpdesk.ncas.ac.uk/u/SimonTett)\ **Replies:** 13\ **Last updated:** [4 November 2025 14:29 UTC](https://cms-helpdesk.ncas.ac.uk/t/model-failures/1852 "2025-11-04T14:29:08Z")
I submitted a bunch of short atmosphere simulations last night. Two failed: opt\_dfols4/d4002 – blew up on timestep 3775 Model time: 2010-10-23 10:20:00.. opt\_dfols4/d4007 – ran out of time. Last timestep in the pe00… --- ## [Postproc\_atmos failure: IndexError](https://cms-helpdesk.ncas.ac.uk/t/postproc-atmos-failure-indexerror/1855)
**Author:** [@earbsn](https://cms-helpdesk.ncas.ac.uk/u/earbsn)\ **Replies:** 2\ **Last updated:** [4 November 2025 11:17 UTC](https://cms-helpdesk.ncas.ac.uk/t/postproc-atmos-failure-indexerror/1855 "2025-11-04T11:17:37Z")
Hi, I am running the suite called ‘fixed’ (a copy of u-dc838). It has ran the first 5 years but has failed on the atmosphere post-processing step of the 1st year with an IndexError as part of create\_um\_mean function in a… --- ## [Model output streams not found](https://cms-helpdesk.ncas.ac.uk/t/model-output-streams-not-found/1848)
**Author:** [@rglazer](https://cms-helpdesk.ncas.ac.uk/u/rglazer)\ **Replies:** 1\ **Last updated:** [30 October 2025 13:58 UTC](https://cms-helpdesk.ncas.ac.uk/t/model-output-streams-not-found/1848 "2025-10-30T13:58:39Z")
Hello, I’m on the monsoon3 system and I’ve spent quite a bit of time trying to find out why I’m getting an ‘Unable to find file id (ts\_w\_frie) in portio or netcdf file lists’ error. When I check my output streams over a… --- ## [Cylc8 UKESM suite auto retriggering into an unrecoverable state](https://cms-helpdesk.ncas.ac.uk/t/cylc8-ukesm-suite-auto-retriggering-into-an-unrecoverable-state/1846)
**Author:** [@Robin\_Smith](https://cms-helpdesk.ncas.ac.uk/u/Robin_Smith)\ **Replies:** 1\ **Last updated:** [27 October 2025 16:42 UTC](https://cms-helpdesk.ncas.ac.uk/t/cylc8-ukesm-suite-auto-retriggering-into-an-unrecoverable-state/1846 "2025-10-27T16:42:31Z")
Hi guys, I have an intermittent problematic behaviour with my cylc8 UKESM1.2 (ARIA PROMOTE) suites on archer2. I think the current state of u-ds260/19560701T0000Z/coupled illustrates the symptoms. The first attempt at … --- ## [Running a Standard Suite submission error](https://cms-helpdesk.ncas.ac.uk/t/running-a-standard-suite-submission-error/1844)
**Author:** [@dramauh](https://cms-helpdesk.ncas.ac.uk/u/dramauh)\ **Replies:** 2\ **Last updated:** [24 October 2025 09:14 UTC](https://cms-helpdesk.ncas.ac.uk/t/running-a-standard-suite-submission-error/1844 "2025-10-24T09:14:44Z")
Dear Community, I have just started playing with rose, I was trying to complete the training course for UM. Apparently, the job.err file is not being created..It seems a permission error. Did I miss something? I am usin… --- ## [Gregorian Emissions](https://cms-helpdesk.ncas.ac.uk/t/gregorian-emissions/1813)
**Author:** [@hannahbryant](https://cms-helpdesk.ncas.ac.uk/u/hannahbryant)\ **Replies:** 7\ **Last updated:** [22 October 2025 17:30 UTC](https://cms-helpdesk.ncas.ac.uk/t/gregorian-emissions/1813 "2025-10-22T17:30:32Z")
Hi, I have created a new set of emissions, which are on a 360 day calendar and I would like to use them in a nudged run (365 day calendar). I have ensured that calendar flexible is set to 1 and so assumed this would all… --- ## [Cmip6+ ancil files on monsoon3](https://cms-helpdesk.ncas.ac.uk/t/cmip6-ancil-files-on-monsoon3/1840)
**Author:** [@rossherbert](https://cms-helpdesk.ncas.ac.uk/u/rossherbert)\ **Replies:** 2\ **Last updated:** [21 October 2025 14:48 UTC](https://cms-helpdesk.ncas.ac.uk/t/cmip6-ancil-files-on-monsoon3/1840 "2025-10-21T14:48:40Z")
Hello, I’m working to get my suites running on monsoon3 (previously running on monsoon2). There are a few directories that don’t exist on monsoon3 (but did on ..2). I have listed some of them below. Are these located els… --- ## [Issue with CAP9.1 after archer2 update](https://cms-helpdesk.ncas.ac.uk/t/issue-with-cap9-1-after-archer2-update/1834)
**Author:** [@cemachelen](https://cms-helpdesk.ncas.ac.uk/u/cemachelen)\ **Replies:** 3\ **Last updated:** [17 October 2025 15:57 UTC](https://cms-helpdesk.ncas.ac.uk/t/issue-with-cap9-1-after-archer2-update/1834 "2025-10-17T15:57:13Z")
I see ARCHER2 made some upgrades yesterday and I’m working my way through fixing the various library errors I’ve got. I’m using CAP 9.1 from /work/y07/shared/umshared/CAP9.1/build/bin/ but now I get the error poe /work… --- ## [UM on ARCHER: No Host Selected](https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830)
**Author:** [@mbrown](https://cms-helpdesk.ncas.ac.uk/u/mbrown)\ **Replies:** 1\ **Last updated:** [10 October 2025 13:37 UTC](https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830 "2025-10-10T13:37:46Z")
Hi NCAS Helpdesk, I’m trying to run the UM on ARCHER (suite u-dt361). I copied it from a suite which was working fine when I last used it, 6 months ago. I’m not sure what I’ve done for it to stop working, but I get the… --- ## [Extracting Daily Maximum Temperature from UKESM](https://cms-helpdesk.ncas.ac.uk/t/extracting-daily-maximum-temperature-from-ukesm/1808)
**Author:** [@meghnasoni](https://cms-helpdesk.ncas.ac.uk/u/meghnasoni)\ **Replies:** 7\ **Last updated:** [19 September 2025 09:27 UTC](https://cms-helpdesk.ncas.ac.uk/t/extracting-daily-maximum-temperature-from-ukesm/1808 "2025-09-19T09:27:15Z")
Hello, I am trying to extract the daily maximum temperature from my UKESM model run. The stash code for both daily maximum and minimum temperature is the same: 03236. Is there a way to specify in the query file to extr… --- ## [Validation fail](https://cms-helpdesk.ncas.ac.uk/t/validation-fail/1783)
**Author:** [@SimonTett](https://cms-helpdesk.ncas.ac.uk/u/SimonTett)\ **Replies:** 5\ **Last updated:** [5 September 2025 10:34 UTC](https://cms-helpdesk.ncas.ac.uk/t/validation-fail/1783 "2025-09-05T10:34:59Z")
Hi, I am getting a validation fail from cylc8 for some of my workflows – for u-dr496 after editing: \[tetts@puma2 u-dr496\]$ cylc vip u-dr496 $ cylc validate /home/n02/n02/tetts/roses/u-dr496 WorkflowConfigError: Inva… --- ## [Error activating new UKCA tracers](https://cms-helpdesk.ncas.ac.uk/t/error-activating-new-ukca-tracers/1789)
**Author:** [@isangha](https://cms-helpdesk.ncas.ac.uk/u/isangha)\ **Replies:** 23\ **Last updated:** [2 September 2025 08:37 UTC](https://cms-helpdesk.ncas.ac.uk/t/error-activating-new-ukca-tracers/1789 "2025-09-02T08:37:27Z")
Hello, I am trying to move a scheme I implemented into UM vn13.4 to UM vn13.9 for running on Monsoon3. The scheme includes 9 new UKCA tracers. I am getting the following error when running the new branch at vn13.9 with … [Previous page](https://cms-helpdesk.ncas.ac.uk/c/unified-model/5.md?page=1) [Next page](https://cms-helpdesk.ncas.ac.uk/c/unified-model/5.md?page=3)