# Task failed with "Iris Module is not available" **URL:** \ **Category:** Uncategorized\ **Created:** [20 October 2025 09:01 UTC](https://cms-helpdesk.ncas.ac.uk/t/task-failed-with-iris-module-is-not-available/1837 "2025-10-20T09:01:44Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![dhoang](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@dhoang](https://cms-helpdesk.ncas.ac.uk/u/dhoang)\ **Post date:** [20 October 2025 09:01 UTC](https://cms-helpdesk.ncas.ac.uk/t/task-failed-with-iris-module-is-not-available/1837/1 "2025-10-20T09:01:44Z")
Good morning, I am running few suites (u-dr118, u-dr666 and u-dr674) on puma2/archer2. All was fine but since last Friday task postproc-atmos started to fail with error message “Iris Module is not available”. I don’t know how to solve this. Could you help me with this? Thank you for your support. Dieu ---
**Author:** ![dhoang](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@dhoang](https://cms-helpdesk.ncas.ac.uk/u/dhoang)\ **Post date:** [20 October 2025 10:55 UTC](https://cms-helpdesk.ncas.ac.uk/t/task-failed-with-iris-module-is-not-available/1837/2 "2025-10-20T10:55:58Z")
I didn’t attach the full error message so here it is: ”[WARN] Iris Module is not available Traceback (most recent call last): File “/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/main\_pp.py”, line 119, in main() File “/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/main\_pp.py”, line 112, in main run\_postproc() File “/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/main\_pp.py”, line 83, in run\_postproc getattr(model, meth)() File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/timer.py”, line 115, in wrapper out = function(\*args, \*\*kw) File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/atmos.py”, line 491, in do\_meaning icode = self.update\_meanfile(meanfile, setend) File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/timer.py”, line 115, in wrapper out = function(\*args, \*\*kw) File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/atmos.py”, line 445, in update\_meanfile rcode = climatemean.create\_mean(meanfile, File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/timer.py”, line 115, in wrapper out = function(\*args, \*\*kw) File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/climatemean.py”, line 256, in create\_mean icode, output = target\_app(meanfile, \*\*kwargs) File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/timer.py”, line 115, in wrapper out = function(\*args, \*\*kw) File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/atmos\_transform.py”, line 275, in create\_um\_mean load\_mule = [mule.load\_umfile(f) for f in meanfile.component\_files] File “/mnt/lustre/a2fs-work2/work/n02/n02/dhoang/cylc-run/u-dr118/share/fcm\_make\_pp/build/bin/atmos\_transform.py”, line 275, in load\_mule = [mule.load\_umfile(f) for f in meanfile.component\_files] File “/work/y07/shared/umshared/lib/python3.9/mule/ **init**.py”, line 1845, in load\_umfile result = \_load\_umfile(file\_path, open\_file) File “/work/y07/shared/umshared/lib/python3.9/mule/ **init**.py”, line 1836, in \_load\_umfile raise ValueError(msg) ValueError: Unknown dataset\_type 0, supported types are dict\_keys([1, 2, 3, 4, 5]) [FAIL] main\_pp.py atmos \<\<‘ **STDIN** ’ [FAIL] [FAIL] ‘ **STDIN** ’ # return-code=1 2025-10-20T09:56:16Z CRITICAL - failed/EXIT” ---
**Author:** ![grenville](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/grenville/32/29_2.png) [@grenville](https://cms-helpdesk.ncas.ac.uk/u/grenville)\ **Post date:** [20 October 2025 11:02 UTC](https://cms-helpdesk.ncas.ac.uk/t/task-failed-with-iris-module-is-not-available/1837/3 "2025-10-20T11:02:57Z")
Dieu `Iris Module is not available` is merely a warning, not an error. The problem is corrupt seasonal mean files: `grenvill@ln03:/work/n02/n02/dhoang/cylc-run/u-dr118/share/data/History_Data> ls -lrt /work/n02/n02/dhoang/cylc-run/u-dr118/share/data/History_Data/dr118a.ps2297*` `-rw-r–r-- 1 dhoang n02 5138636800 Oct 16 07:36 /work/n02/n02/dhoang/cylc-run/u-dr118/share/data/History_Data/dr118a.ps2297djf` `-rw-r–r-- 1 dhoang n02 563986432 Oct 16 15:08 /work/n02/n02/dhoang/cylc-run/u-dr118/share/data/History_Data/dr118a.ps2297mam` `-rw-r–r-- 1 dhoang n02 563986432 Oct 16 18:52 /work/n02/n02/dhoang/cylc-run/u-dr118/share/data/History_Data/dr118a.ps2297jja` `-rw-r–r-- 1 dhoang n02 5139853312 Oct 16 22:23 /work/n02/n02/dhoang/cylc-run/u-dr118/share/data/History_Data/dr118a.ps2297son` You will need to recreate mam and jja seasonal means (I didn’t check other suites) Grenville ---
**Author:** ![dhoang](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@dhoang](https://cms-helpdesk.ncas.ac.uk/u/dhoang)\ **Post date:** [21 October 2025 11:00 UTC](https://cms-helpdesk.ncas.ac.uk/t/task-failed-with-iris-module-is-not-available/1837/4 "2025-10-21T11:00:52Z")
Thanks for your response. The other suites have the same problem. I will rerun from before the problem happened then. Have a nice day. Dieu ---
**Author:** ![system](https://europe1.discourse-cdn.com/flex013/uploads/cms_support/original/1X/1fd2411499ffcbc299fe756cd5cdf26e44956558.png) [@system](https://cms-helpdesk.ncas.ac.uk/u/system)\ **Post date:** [20 November 2025 11:01 UTC](https://cms-helpdesk.ncas.ac.uk/t/task-failed-with-iris-module-is-not-available/1837/5 "2025-11-20T11:01:32Z")
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