# Invalid --het-group value: 128

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/invalid-het-group-value-128/377>\
**Category:** Unified Model\
**Tags:** ARCHER2, PUMATest\
**Created:** [3 January 2022 16:43 UTC](https://cms-helpdesk.ncas.ac.uk/t/invalid-het-group-value-128/377 "2022-01-03T16:43:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![luciana](https://avatars.discourse-cdn.com/v4/letter/l/a698b9/32.png) [@luciana](https://cms-helpdesk.ncas.ac.uk/u/luciana)\
**Post date:** [3 January 2022 16:43 UTC](https://cms-helpdesk.ncas.ac.uk/t/invalid-het-group-value-128/377/1 "2022-01-03T16:43:01Z")

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Hello.

I was running something quite big in terms of the number of ensembles and then I bumped into this error message. Is this something easy to fix?

srun: error: Invalid --het-group value: 128

The suites are u-ch427-0n96-ens256 and u-ch427-0n96-ens257. The number of ensembles, 256 and 257, is the minimal to be run the largescale queue in the full Archer2 system.

Kind regards, Luciana.

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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:** [6 January 2022 11:05 UTC](https://cms-helpdesk.ncas.ac.uk/t/invalid-het-group-value-128/377/2 "2022-01-06T11:05:24Z")

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Hi Luciana,

Talking to Archer2 this looks to be a system imposed limit.

Slurm het job functionality was not designed for running such large ensembles as far as I understand.

Regards,  
Ros.

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<div class="post-metadata">

**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:** [23 February 2022 12:55 UTC](https://cms-helpdesk.ncas.ac.uk/t/invalid-het-group-value-128/377/3 "2022-02-23T12:55:21Z")

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Closed on 23 February 2022 12:55 UTC