# Tips, tricks, and troubleshooting for new ACCESS-ESM 1.5 user

**URL:** <https://forum.access-hive.org.au/t/tips-tricks-and-troubleshooting-for-new-access-esm-1-5-user/2166>\
**Category:** Earth System\
**Tags:** help, payu, access-esm\
**Created:** [17 June 2024 02:20 UTC](https://forum.access-hive.org.au/t/tips-tricks-and-troubleshooting-for-new-access-esm-1-5-user/2166 "2024-06-17T02:20:19Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![spencerwong](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/spencerwong/32/1894_2.png) [@spencerwong](https://forum.access-hive.org.au/u/spencerwong)\
**Post date:** [23 June 2024 23:40 UTC](https://forum.access-hive.org.au/t/tips-tricks-and-troubleshooting-for-new-access-esm-1-5-user/2166/8 "2024-06-23T23:40:57Z")

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Hi Hannah, great questions!

> [@hrsdawson](#):
>
> This was solved by using the backup restart file in the same directory, but would it be better practice to use the restart here: `/g/data/vk83/experiments/inputs/access-esm1p5/pre-industrial/restart/`?

Some of the restart files in `/g/data/access/payu/access-esm/restart/pre-industrial` have unclear origins and they [don’t appear to match](https://github.com/coecms/access-esm/issues/11#issue-2135487421) the restart files from the original pre-industrial simulations. For reproducibility, it might be best to use the restarts in `/g/data/vk83`, which are copied from the original `PI-02` simulation.

> [@hrsdawson](#):
>
> Does anyone know where these restarts for the pre-industrial control are stored?

They’re a bit hard to find at the moment, but restart and history files for the CMIP6 experiments along with several non-CMIP experiments are stored in `/g/data/p73/archive`. There are two different ESM1.5 pre-industrial experiments stored there: `PI-01` which was originally run on raijin, and `PI-02` which was run on gadi. `PI-01` isn’t reproducible on gadi, and so it’s probably worth using the restarts from `PI-02` stored in `/g/data/p73/archive/CMIP6/ACCESS-ESM1-5/PI-02`.

> [@hrsdawson](#):
>
> If I change the restart year, do I need to be aware of any other intricacies?

There are a few intricacies! I’ll run through what worked for me in changing the restart year to 700. A few points aren’t completely clear to me still – I’ll update them if I find out anything more. If you or anyone notices anything that’s not quite right, let me know!

1. Copy the relevant restart files from `/g/data/p73/archive/CMIP6/ACCESS-ESM1-5/PI-02/restart` (in this case, those ending with `-07000101` or `-06993112`) to a new directory, e.g. `<new-restart-dir>`, separating them into `atmosphere`, `ocean`, `ice`, and `coupler` subdirectories.

2. In the experiment’s `config.yaml` file, edit the `restart` option to point to `<new-restart-dir>`.

3. Create symlinks: Each model will look for restart files which don’t have date-stamps at the end of their name. E.g. in `<control-directory>/ocean/field_table` , the ocean model will try to use:

4. Next, we need to update each model’s namelist files in `<control-directory>/{atmosphere,ocean,ice}` to have the correct starting dates:

Let me know if you have any questions about those steps, or if anything doesn’t work when trying them out.

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