# Validity Time Mismatch

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773>\
**Category:** Unified Model\
**Tags:** ARCHER2\
**Created:** [11 August 2025 14:08 UTC](https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773 "2025-08-11T14:08:43Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![ajw1g19](https://avatars.discourse-cdn.com/v4/letter/a/35a633/32.png) [@ajw1g19](https://cms-helpdesk.ncas.ac.uk/u/ajw1g19)\
**Post date:** [11 August 2025 14:08 UTC](https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773/1 "2025-08-11T14:08:43Z")

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Dear CMS Helpdesk,

I’m encountering an error during the `postproc` for suite `u-dr920`:

```auto
Validity time mismatch in file /work/n02/n02/ajw1g19/cylc-run/u-dr920/share/data/History_Data/dr920a.pm18500101 to be archived
	--> Expected [1850, 1, 1, 0, 0, 0] and got [1850, 2, 1]

```

Could you please advise?

Thanks,  
Alfred

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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:** [19 August 2025 08:55 UTC](https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773/2 "2025-08-19T08:55:54Z")

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Hi Alfred,

Sorry for the delay. I had to refamiliarise myself with the postprocessing code to see what was going on.

The problem is because of the climate meaning settings in the suite in combination with you setting a `.pm` stream in STASH.

Unfortunately in the code having `create_means = false` and `create_monthly_mean=false` has caused it to go into a part of the code it shouldn’t when it identifies it is dealing with a monthly mean file.

I would suggest as a workaround one of the following 2 options:

1. Try setting `create_means = true` but leaving `create_monthly_mean = false` as well as the seasonal & yearly assuming you don’t want them either.  
or
2. Change the `.pm` stream to some other letter

I haven’t been able to test option (1) fully in your suite as there a couple of issues with the setup of it for it to run under cylc8.

1. For the cylc-run directories to be setup correctly on ARCHER2 we need to have remote\_setup task in our suites. See: [Upgrading to Cylc 8](https://cms.ncas.ac.uk/cylc8/upgrading-workflows/#a-add-a-remote_setup-task-to-the-graph)
2. All code branches must refer to the mirrors not the MOSRS repos so make sure they are `fcm:um.xm-br` not `fcm:um.x-br`, etc
3. There’s an `execution time limit` in the wrong place. I can’t remember which file; but when you try to run with cylc8 it’ll tell you there is a syntax error.

Cheers,  
Ros.

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<div class="post-metadata">

**Author:** ![ajw1g19](https://avatars.discourse-cdn.com/v4/letter/a/35a633/32.png) [@ajw1g19](https://cms-helpdesk.ncas.ac.uk/u/ajw1g19)\
**Post date:** [27 August 2025 07:55 UTC](https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773/3 "2025-08-27T07:55:32Z")

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Hi Ros,

Could you explain in more detail where to add the `remote_setup` tasks in the `flow.cylc` file?

Thanks,  
Alf

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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:** [27 August 2025 15:18 UTC](https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773/4 "2025-08-27T15:18:20Z")

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Hi Alfred,

I’ve just looked at your suite and everything you have added is correct. The only thing missing in the `flow.cylc` file is that task `remote_setup` needs to be added before **any** (ie. all) `fcm_make` tasks. So in your suite you also need to add `remote_setup =>` in the graph before both the `fcm_make_pp` and `fcm_make_pptransfer` tasks.

Once you’ve done that I think the directory symlinks should be setup correctly on ARCHER2.

Cheers,  
Ros.

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**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:** [26 September 2025 15:18 UTC](https://cms-helpdesk.ncas.ac.uk/t/validity-time-mismatch/1773/5 "2025-09-26T15:18:41Z")

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