# Cylc Support **URL:** https://cylc.discourse.group/c/cylc/cylc-support/9.md?page=1 [Latest](https://cylc.discourse.group/latest.md) · [Categories](https://cylc.discourse.group/categories.md) **Page:** 2 --- ## [Please help with cycling behaviour](https://cylc.discourse.group/t/please-help-with-cycling-behaviour/1304)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 2\ **Last updated:** [April 9, 2026, 9:37am UTC](https://cylc.discourse.group/t/please-help-with-cycling-behaviour/1304 "2026-04-09T09:37:21Z")
Hello, please help me understand this behaviour. I have a test workflow that is supposed to run every monday and wednesday, with the restart files of the previous run. \[ scheduling \] initial cycle point = 20260323 … --- ## [Cylc 8.6.2 how to grab execution time limit as variable](https://cylc.discourse.group/t/cylc-8-6-2-how-to-grab-execution-time-limit-as-variable/1294)
**Author:** [@hollabigj](https://cylc.discourse.group/u/hollabigj)\ **Replies:** 12\ **Last updated:** [March 19, 2026, 10:14pm UTC](https://cylc.discourse.group/t/cylc-8-6-2-how-to-grab-execution-time-limit-as-variable/1294 "2026-03-19T22:14:22Z")
execution time limit = 15m How do we grab that execution time limit and pass on to the other script for conditional check against age and time. IE ${CYLC\_TIME…} Thanks. --- ## [Mixing cycle and interval scheduling results in stall](https://cylc.discourse.group/t/mixing-cycle-and-interval-scheduling-results-in-stall/1299)
**Author:** [@srennie](https://cylc.discourse.group/u/srennie)\ **Replies:** 6\ **Last updated:** [March 18, 2026, 4:05am UTC](https://cylc.discourse.group/t/mixing-cycle-and-interval-scheduling-results-in-stall/1299 "2026-03-18T04:05:07Z")
My workflow keeps stalling after it hits a cycle with a cycle-specific dependency. Minimal example (hopefully transcribed correctly) \[scheduler\] \[scheduling\] initial cycle point = 20230101T06 final cycle point … --- ## [Handling run host swaps in operational environment](https://cylc.discourse.group/t/handling-run-host-swaps-in-operational-environment/1296)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 13\ **Last updated:** [March 17, 2026, 10:49am UTC](https://cylc.discourse.group/t/handling-run-host-swaps-in-operational-environment/1296 "2026-03-17T10:49:39Z")
Kia ora! In our operational environment, Meteo France has the purview to swap where our pipelines are running at any time between two systems named belenos and taranis (see gallic gods). I need to come up with a new proc… --- ## [Suggestions sought for handling complex workflow](https://cylc.discourse.group/t/suggestions-sought-for-handling-complex-workflow/1286)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 10\ **Last updated:** [March 10, 2026, 10:01am UTC](https://cylc.discourse.group/t/suggestions-sought-for-handling-complex-workflow/1286 "2026-03-10T10:01:34Z")
Hi all! We are in the process of verifying our first full workflow in order to put it in production (yey!), and I am already trying to figure out how to handle a variation of it. This workflow would be relatively eas… --- ## [Variable length task parameterisation](https://cylc.discourse.group/t/variable-length-task-parameterisation/1293)
**Author:** [@lispandfound](https://cylc.discourse.group/u/lispandfound)\ **Replies:** 4\ **Last updated:** [March 6, 2026, 2:38am UTC](https://cylc.discourse.group/t/variable-length-task-parameterisation/1293 "2026-03-06T02:38:51Z")
I have used cylc for a couple of years now to perform variations of workflows in ground motion simulations, where we are interested in simulating a number of events, with each event having a number of realisations. Reali… --- ## [Persistent web UI view and colour scheme?](https://cylc.discourse.group/t/persistent-web-ui-view-and-colour-scheme/1292)
**Author:** [@jonnyhtwilliams](https://cylc.discourse.group/u/jonnyhtwilliams)\ **Replies:** 10\ **Last updated:** [March 4, 2026, 3:24pm UTC](https://cylc.discourse.group/t/persistent-web-ui-view-and-colour-scheme/1292 "2026-03-04T15:24:39Z")
Hiya Is it possible to make the default view and/or colour scheme persistent across different sessions? for example I pretty much always want to use the graph view, grouped by cycle point and use the colour deficient sc… --- ## [Skip retries on specific message output](https://cylc.discourse.group/t/skip-retries-on-specific-message-output/1291)
**Author:** [@aulemahal](https://cylc.discourse.group/u/aulemahal)\ **Replies:** 1\ **Last updated:** [March 2, 2026, 2:50pm UTC](https://cylc.discourse.group/t/skip-retries-on-specific-message-output/1291 "2026-03-02T14:50:58Z")
Hi! I have a long-running task that often fails with random read errors. I have to fix this, but for the mean time I simply made it retry up to 3 times and in 99% of the cases it works on the second try. However, this … --- ## [Workflow programmer position at Mercator-Océan Int'l](https://cylc.discourse.group/t/workflow-programmer-position-at-mercator-ocean-intl/1289)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 0\ **Last updated:** [February 19, 2026, 1:14pm UTC](https://cylc.discourse.group/t/workflow-programmer-position-at-mercator-ocean-intl/1289 "2026-02-19T13:14:58Z")
Mercator Ocean International is recruiting a Workflow Management Developer to strengthen its operational ocean forecasting systems. You will work at the core of scientific production chains to design, industrialise and m… --- ## [ApolloError: Response not successful: Received status code 403](https://cylc.discourse.group/t/apolloerror-response-not-successful-received-status-code-403/1288)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 3\ **Last updated:** [February 13, 2026, 4:48pm UTC](https://cylc.discourse.group/t/apolloerror-response-not-successful-received-status-code-403/1288 "2026-02-13T16:48:15Z")
Hi there, I seem to get this error constantly when running cylc gui. In particular when I click on a different workflow on the sidebar However, there’s a caveat in my case. I’m accessing the jupyter server via a websock… --- ## [\[issue\] platform not defined](https://cylc.discourse.group/t/issue-platform-not-defined/1285)
**Author:** [@Jerry](https://cylc.discourse.group/u/Jerry)\ **Replies:** 8\ **Last updated:** [February 2, 2026, 9:28am UTC](https://cylc.discourse.group/t/issue-platform-not-defined/1285 "2026-02-02T09:28:58Z")
Hi, I’m new to Cylc 8. Cylc 8.6.2 and rose 2.6.2 were installed to a centralized loation with command “pip3 install --user” I played examples extracted from the cylc.flow package with installed Cylc/rose environement… --- ## [Syntax and usage of 'cylc view'](https://cylc.discourse.group/t/syntax-and-usage-of-cylc-view/1279)
**Author:** [@jonnyhtwilliams](https://cylc.discourse.group/u/jonnyhtwilliams)\ **Replies:** 8\ **Last updated:** [January 22, 2026, 8:22pm UTC](https://cylc.discourse.group/t/syntax-and-usage-of-cylc-view/1279 "2026-01-22T20:22:33Z")
Hi there. In cylc view how can I make it explicitly show all the files which are being included by e.g. {% if TASK\_RUN and TASK\_TESTS %} {% include “site/” \\~ SITE \\~“-tests.cylc” %} {% endif %} I see there is this op… --- ## [Include a task in all but the first cycle point](https://cylc.discourse.group/t/include-a-task-in-all-but-the-first-cycle-point/115)
**Author:** [@jonnyhtw](https://cylc.discourse.group/u/jonnyhtw)\ **Replies:** 6\ **Last updated:** [January 13, 2026, 3:40pm UTC](https://cylc.discourse.group/t/include-a-task-in-all-but-the-first-cycle-point/115 "2026-01-13T15:40:58Z")
Hi there In this section of the Cylc docs, it tells you how to include something in only the first cycle point of a suite. How would I include a task in every cycle apart from the first one? Thanks! Jonny --- ## [Cylc job shebang](https://cylc.discourse.group/t/cylc-job-shebang/1273)
**Author:** [@sparonuz](https://cylc.discourse.group/u/sparonuz)\ **Replies:** 3\ **Last updated:** [December 17, 2025, 11:02pm UTC](https://cylc.discourse.group/t/cylc-job-shebang/1273 "2025-12-17T23:02:35Z")
Hi there, I have been struggling with a problem for quite sometimes, and since I can’t find my way out, let’s see if you can help me. In our workflow, one of the components is a bash script running a Fortran executable… --- ## [Question about cycling](https://cylc.discourse.group/t/question-about-cycling/1272)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 2\ **Last updated:** [December 5, 2025, 10:00am UTC](https://cylc.discourse.group/t/question-about-cycling/1272 "2025-12-05T10:00:55Z")
Hi all, in certain situations I want to be able to run a workflow immediately, and then following a specific recursion formula, ie something like “R1 & R/+P5D/P7D” but this does not validate. What is the correct way to … --- ## [Cylc keepalive best practices](https://cylc.discourse.group/t/cylc-keepalive-best-practices/1271)
**Author:** [@ejhyer](https://cylc.discourse.group/u/ejhyer)\ **Replies:** 1\ **Last updated:** [December 5, 2025, 7:21am UTC](https://cylc.discourse.group/t/cylc-keepalive-best-practices/1271 "2025-12-05T07:21:25Z")
cylc-flow 8.4.2 pyh3a29b38\_0 conda-forge cylc-flow-base 8.4.2 pyh707e725\_0 conda-forge cylc-ui 1.0.0 ha770c72\_0 conda-forge H… --- ## [What's wrong with my flow.cylc?](https://cylc.discourse.group/t/whats-wrong-with-my-flow-cylc/1269)
**Author:** [@LoganChen](https://cylc.discourse.group/u/LoganChen)\ **Replies:** 6\ **Last updated:** [December 2, 2025, 3:40am UTC](https://cylc.discourse.group/t/whats-wrong-with-my-flow-cylc/1269 "2025-12-02T03:40:01Z")
My cylc version is 8.2.3, the platform is the UCAR’s derecho supercomputer. I intended to repeat a simple run (using PBS system) 10 times, instead it always runs for only once. What’s wrong with my files below? Below is … --- ## [ECMWF, cylc not found error when using UKMO cylc installation remotely](https://cylc.discourse.group/t/ecmwf-cylc-not-found-error-when-using-ukmo-cylc-installation-remotely/1267)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 1\ **Last updated:** [November 25, 2025, 10:22am UTC](https://cylc.discourse.group/t/ecmwf-cylc-not-found-error-when-using-ukmo-cylc-installation-remotely/1267 "2025-11-25T10:22:43Z")
Hi there! We were able to successfully use @dpmatthews’s cylc installation to run workflows locally. I’ve been testing running remotely, but I am running into problems. I’ve entered the location of cylc in the platfom … --- ## [Bug in graphing xtrigger dependencies?](https://cylc.discourse.group/t/bug-in-graphing-xtrigger-dependencies/1264)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 9\ **Last updated:** [November 21, 2025, 10:27am UTC](https://cylc.discourse.group/t/bug-in-graphing-xtrigger-dependencies/1264 "2025-11-21T10:27:14Z")
Hi y’all. I have been testing external triggers. The relevant portion of my flow.cylc \[scheduling\] section below: \[\[ xtriggers \]\] nowcast = workflow\_state("test\_nowcast//%(point)s/block\_NEMO\_cycle1", offset=… --- ## [Question re global.cylc\[platforms\]\[\\]hosts](https://cylc.discourse.group/t/question-re-global-cylc-platforms-platform-name-hosts/1263)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 7\ **Last updated:** [November 18, 2025, 3:41pm UTC](https://cylc.discourse.group/t/question-re-global-cylc-platforms-platform-name-hosts/1263 "2025-11-18T15:41:15Z")
I am trying to come up with the best way to describe the the environment of ECMWF’s HPC center. I have this: \[\[ecmwf\_login\]\] hosts = hpc-login job runner = background communication method = p… --- ## [Problems with (family) triggers](https://cylc.discourse.group/t/problems-with-family-triggers/1261)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 3\ **Last updated:** [November 12, 2025, 2:17pm UTC](https://cylc.discourse.group/t/problems-with-family-triggers/1261 "2025-11-12T14:17:02Z")
Kia ora! I am now trying to introduce dependency between “casts” in my workflow, but I am getting an error that I can’t get rid of. I am doing this in a simplified workflow, and here is the relevant bit of code : {% set… --- ## [Graph conditional on day of the week](https://cylc.discourse.group/t/graph-conditional-on-day-of-the-week/1260)
**Author:** [@gturek](https://cylc.discourse.group/u/gturek)\ **Replies:** 2\ **Last updated:** [November 7, 2025, 8:53am UTC](https://cylc.discourse.group/t/graph-conditional-on-day-of-the-week/1260 "2025-11-07T08:53:30Z")
Hi there! I have the following situation: PID = """ forecast\[-P1D\] =\> forecast # except on thursdays when nowcast\[-P1D\] =\> forecast """ How do I implement this condition? Cheers! --- ## [Configuring Cylc on REANNZ/NeSI platform](https://cylc.discourse.group/t/configuring-cylc-on-reannz-nesi-platform/1259)
**Author:** [@pletzer](https://cylc.discourse.group/u/pletzer)\ **Replies:** 6\ **Last updated:** [November 5, 2025, 3:42am UTC](https://cylc.discourse.group/t/configuring-cylc-on-reannz-nesi-platform/1259 "2025-11-05T03:42:22Z")
Hi all, On the new REANNZ platform, the cylc command is no longer available. Users must install Cylc using the Conda commands. I’m trying to configure Cylc. My global.cylc file is #!Jinja2 \[platforms\] \[\[mahuika-slurm\]… --- ## [Cylc xtrigger question](https://cylc.discourse.group/t/cylc-xtrigger-question/1255)
**Author:** [@Rosalyn\_Hatcher](https://cylc.discourse.group/u/Rosalyn_Hatcher)\ **Replies:** 9\ **Last updated:** [October 14, 2025, 6:53pm UTC](https://cylc.discourse.group/t/cylc-xtrigger-question/1255 "2025-10-14T18:53:37Z")
Hi, I’ve been experimenting using xtriggers to detect the arrival of a data file. The polling xtrigger function correctly detects the incoming data file and returns the contents which is a directory path. Is the resul… --- ## [Useful workflow pattern for "case studies", with start, end and recurrence?](https://cylc.discourse.group/t/useful-workflow-pattern-for-case-studies-with-start-end-and-recurrence/1248)
**Author:** [@edmundh](https://cylc.discourse.group/u/edmundh)\ **Replies:** 5\ **Last updated:** [October 3, 2025, 6:55am UTC](https://cylc.discourse.group/t/useful-workflow-pattern-for-case-studies-with-start-end-and-recurrence/1248 "2025-10-03T06:55:03Z")
Hi all - as just discussed with @oliver.sanders, am wanting to have a workflow which can run a given graph in one of two modes: near-real-time: vanilla 6H recurrence cycling - am fine writing the graph recurrence synta… --- ## [Allow cycle offsets for things like \`cylc set ... -pre=...\`?](https://cylc.discourse.group/t/allow-cycle-offsets-for-things-like-cylc-set-pre/1242)
**Author:** [@TomC](https://cylc.discourse.group/u/TomC)\ **Replies:** 2\ **Last updated:** [September 18, 2025, 9:17am UTC](https://cylc.discourse.group/t/allow-cycle-offsets-for-things-like-cylc-set-pre/1242 "2025-09-18T09:17:36Z")
I was wondering if it would be possible, and reasonable to allow users to do commands like cylc set –pre=-PT6H/task:succeeded ... - use of offsets rather than having to pre-calculate the appropriate cycle? This would add… --- ## [Cylc set in web user interface - provide drop down of good options](https://cylc.discourse.group/t/cylc-set-in-web-user-interface-provide-drop-down-of-good-options/1243)
**Author:** [@TomC](https://cylc.discourse.group/u/TomC)\ **Replies:** 1\ **Last updated:** [September 18, 2025, 9:15am UTC](https://cylc.discourse.group/t/cylc-set-in-web-user-interface-provide-drop-down-of-good-options/1243 "2025-09-18T09:15:13Z")
I was playing with cylc set via the web interface for a specific task. I think it would be very useful, and help prevent errors, if the form could be a bit error proofed. For example, if you do+ ADD ITEM for prerequisite… --- ## [Cylc trigger --flow=new question about pre-reqs](https://cylc.discourse.group/t/cylc-trigger-flow-new-question-about-pre-reqs/1245)
**Author:** [@TomC](https://cylc.discourse.group/u/TomC)\ **Replies:** 1\ **Last updated:** [September 18, 2025, 1:34am UTC](https://cylc.discourse.group/t/cylc-trigger-flow-new-question-about-pre-reqs/1245 "2025-09-18T01:34:09Z")
I’ve asked similar questions before, but I wanted to see if there were any changes with recent updates or plans for future upgrades in this area. When you trigger a new flow, and there are cross cycle pre-reqs, is there… --- ## [Account directives for PBS vs SLURM](https://cylc.discourse.group/t/account-directives-for-pbs-vs-slurm/1241)
**Author:** [@ejhyer](https://cylc.discourse.group/u/ejhyer)\ **Replies:** 1\ **Last updated:** [September 5, 2025, 8:40am UTC](https://cylc.discourse.group/t/account-directives-for-pbs-vs-slurm/1241 "2025-09-05T08:40:11Z")
cylc-flow 8.4.4 pyhb01cd2f\_0 conda-forge cylc-flow-base 8.4.4 pyh707e725\_0 conda-forge My application was written for PBS and has been adapted to use SLURM. The… --- ## [Job submitted via Cylc fails, but runs fine with direct sbatch](https://cylc.discourse.group/t/job-submitted-via-cylc-fails-but-runs-fine-with-direct-sbatch/1240)
**Author:** [@prajeeshag](https://cylc.discourse.group/u/prajeeshag)\ **Replies:** 2\ **Last updated:** [August 30, 2025, 7:31am UTC](https://cylc.discourse.group/t/job-submitted-via-cylc-fails-but-runs-fine-with-direct-sbatch/1240 "2025-08-30T07:31:46Z")
I’m running into an issue where a multinode job submitted through Cylc fail with the error: “cxil\_map: write error” However, if I take the exact job script generated by Cylc and submit it directly with sbatch, the job … [Previous page](https://cylc.discourse.group/c/cylc/cylc-support/9.md) [Next page](https://cylc.discourse.group/c/cylc/cylc-support/9.md?page=2)