# Issues when changing domain in ACCESS-rAM3

**URL:** <https://forum.access-hive.org.au/t/issues-when-changing-domain-in-access-ram3/5943>\
**Category:** rAM3/Regional Nesting Suite\
**Tags:** help\
**Created:** [19 February 2026 07:02 UTC](https://forum.access-hive.org.au/t/issues-when-changing-domain-in-access-ram3/5943 "2026-02-19T07:02:07Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![Paul.Gregory](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/paul.gregory/32/2566_2.png) [@Paul.Gregory](https://forum.access-hive.org.au/u/Paul.Gregory)\
**Post date:** [19 February 2026 08:15 UTC](https://forum.access-hive.org.au/t/issues-when-changing-domain-in-access-ram3/5943/5 "2026-02-19T08:15:27Z")

</div>

Hi @chenhui.jin

The error is given here in `job.err`

```auto
????????????????????????????????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????????????????????
???!!!???!!!???!!!???!!!???!!! ERROR ???!!!???!!!???!!!???!!!???!!!
???!!!???!!!???!!!???!!!???!!! ERROR ???!!!???!!!???!!!???!!!???!!!
? Error code: 4
? Error code: 4
? Error from routine: DECOMPOSE_FULL
? Error from routine: DECOMPOSE_FULL
? Error message: Too many processors in the North-South direction.The maximum permitted is 16
? Error message: Too many processors in the North-South direction.The maximum permitted is 16
? Error from processor: 15
? Error from processor: 272
? Error number: 16
? Error number: 16
????????????????????????????????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????????????????????

```

Can you tell me how many processors you are attempting to run with?

Have a look in `~/roses/u-by395/rose-suite.conf` and search for `rg01_rs01_m01_nproc` i.e. the number of processors allocated to region 1, resolution 1, model 1.

In the default setup these values are

```auto
rg01_rs01_m01_nproc=18,16

```

What are yours set to?

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