# Tracers in ACCESS-OM3

**URL:** https://forum.access-hive.org.au/t/tracers-in-access-om3/6684
**Category:** Ocean
**Tags:** help, access-om3
**Created:** [21 July 2026 01:14 UTC](https://forum.access-hive.org.au/t/tracers-in-access-om3/6684 "2026-07-21T01:14:49Z")
**Posts on this page:** 1
**Showing post:** 5

<div class="post-metadata">

### Author: ![dougiesquire](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/dougiesquire/32/16_2.png) [@dougiesquire](https://forum.access-hive.org.au/u/dougiesquire)
#### Post date: [27 July 2026 07:04 UTC](https://forum.access-hive.org.au/t/tracers-in-access-om3/6684/5 "2026-07-27T07:04:20Z")

</div>

@angus-g’s PR has been merged. It may be a little while before we do another ACCESS-OM3 release, so I’ve created a “prerelease” that you can use in the meantime. You can use this by making the following changes to your `config.yaml`:

```diff
...

#Model software version
modules:
    use:
        - /g/data/vk83/modules
+ - /g/data/vk83/prerelease/modules
    load:
- - access-om3/2026.05.002
+ - access-om3/pr257-1
        - model-tools/mppnccombine-fast/2025.07.000

...

manifest:
  reproduce:
- exe: True
+ exe: False

...

```

Add the following to your `MOM_input` to prevent the accumulation of tracers with `USE_FILE_DYES`:

```auto
FILE_DYE_TRACERS_ACCUMULATE = False

```

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