# Using rose task to edit namelists for UKESM

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/using-rose-task-to-edit-namelists-for-ukesm/416>\
**Category:** Rose/Cylc and FCM\
**Tags:** ARCHER2\
**Created:** [27 January 2022 11:36 UTC](https://cms-helpdesk.ncas.ac.uk/t/using-rose-task-to-edit-namelists-for-ukesm/416 "2022-01-27T11:36:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MikeMineter](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/mikemineter/32/48_2.png) [@MikeMineter](https://cms-helpdesk.ncas.ac.uk/u/MikeMineter)\
**Post date:** [27 January 2022 11:36 UTC](https://cms-helpdesk.ncas.ac.uk/t/using-rose-task-to-edit-namelists-for-ukesm/416/1 "2022-01-27T11:36:05Z")

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Hello  
On PUMATEST I will be starting a suite in which I wish to include an app to amend some namelists’ values (parameters used in some model processes)

Those values are determined on Archer2, so I’d rather amend them there, rather than on PUMATEST  
I think I could do this changing of values in the ./app/um/rose-app.conf on Archer2 but am unsure if I should  
a) do this after fcm\_make (insert an added task to do the edits)  
b) after fcm\_make2

I hope to reuse an executable to avoid a rebuild, so hope the answer is after fcm\_make2…  
I’d appreciate guidance  
Mike

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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 January 2022 12:15 UTC](https://cms-helpdesk.ncas.ac.uk/t/using-rose-task-to-edit-namelists-for-ukesm/416/2 "2022-01-27T12:15:40Z")

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Hi Mike,

I can’t see that it’ll make any difference after which part of the fcm\_make that’s done, so I’d try first after `fcm_make2` as that’s easier for what you want to do. I’ve not tried this so I’m only surmising here.

Cheers,  
Ros.