# UM on ARCHER: No Host Selected

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830>\
**Category:** Unified Model\
**Tags:** PUMA, ARCHER2\
**Created:** [10 October 2025 13:21 UTC](https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830 "2025-10-10T13:21:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mbrown](https://avatars.discourse-cdn.com/v4/letter/m/e68b1a/32.png) [@mbrown](https://cms-helpdesk.ncas.ac.uk/u/mbrown)\
**Post date:** [10 October 2025 13:21 UTC](https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830/1 "2025-10-10T13:21:11Z")

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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 following error:

[FAIL] bash -ec H=$(rose\ host-select\ archer2);\ echo\ $H # return-code=1, stderr=  
[FAIL] [WARN] ln03: (ssh failed)  
[FAIL] [WARN] ln02: (ssh failed)  
[FAIL] [WARN] ln01: (ssh failed)  
[FAIL] [WARN] ln04: (ssh failed)  
[FAIL] [FAIL] No hosts selected.

Aside from changing the emissions files, and changing which project the suite is charged to, it’s the same as before. Could you shed any light on why this is happening?

Many thanks for your time.

Megan

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**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:** [10 October 2025 13:37 UTC](https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830/2 "2025-10-10T13:37:46Z")

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Megan

Please search the helpdesk for similar queries - several exist, see [https://cms-helpdesk.ncas.ac.uk/t/archer2-restart-ssh-fail/1805](https://cms-helpdesk.ncas.ac.uk/t/archer2-restart-ssh-fail/1805) for example.

Grenville

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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:** [11 October 2025 13:38 UTC](https://cms-helpdesk.ncas.ac.uk/t/um-on-archer-no-host-selected/1830/3 "2025-10-11T13:38:05Z")

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