# Help running OceanParcels using xp65

**URL:** <https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620>\
**Category:** COSIMA\
**Tags:** help, community-help\
**Created:** [28 November 2025 07:21 UTC](https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620 "2025-11-28T07:21:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![hrsdawson](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/hrsdawson/32/218_2.png) [@hrsdawson](https://forum.access-hive.org.au/u/hrsdawson)\
**Post date:** [28 November 2025 07:21 UTC](https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620/1 "2025-11-28T07:21:59Z")

</div>

I was running some particle tracking experiments on gadi earlier this year using version 3.1.0 of OceanParcels and the hh5 conda/analysis3 environment. I need to rerun some of these and so I’ve switched to the xp65 conda environment but now I’m getting this zarr store error:

```auto
Traceback (most recent call last):
  File "/scratch/e14/hd4873/particle_tracking/virtual_floats_xp65/trials/release_1/parcels_run_script.py", line 273, in <module>
    output_file = pset.ParticleFile(name=output_directory + output_filename,
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/g/data/xp65/public/apps/med_conda/envs/analysis3-25.09/lib/python3.11/site-packages/parcels/particleset.py", line 913, in ParticleFile
    return ParticleFile(*args, particleset=self, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/g/data/xp65/public/apps/med_conda/envs/analysis3-25.09/lib/python3.11/site-packages/parcels/particlefile.py", line 95, in __init__
    if issubclass(type(name), zarr.storage.Store):
                              ^^^^^^^^^^^^^^^^^^
AttributeError: module 'zarr.storage' has no attribute 'Store'

```

I haven’t made any code changes and I’m using the analysis3-25.09 environment on xp65 which has the same parcels version (3.1.0). Is anyone able to help me troubleshoot this?

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**Author:** ![Aidan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/aidan/32/42_2.png) [@Aidan](https://forum.access-hive.org.au/u/Aidan)\
**Post date:** [28 November 2025 22:18 UTC](https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620/2 "2025-11-28T22:18:14Z")

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Note that @Christopher_Roach has run into the same issue, diagnosed it and proposed a solution

> [@Outdated version of parcels in XP65 conda/analysis3-latest](https://forum.access-hive.org.au/t/outdated-version-of-parcels-in-xp65-conda-analysis3-latest/5619):
>
> Just in the process of updating some of my particle tracking code to work with Parcels v3.X and noticed that when I tried running it under conda/analysis3-latest, it crashed due to an “AttributeError: module ‘zarr.storage’ has no attribute’ ‘Store’ “ error. Looking into things this seems to be due to an incompatibility between Parcels v3.1.0 and Zarr v3.X. Analysis3-latest currently has Parcels v3.1.0 which is intended for use with Zarr 2.X. To fix this you’d need to upgrade to Parcels v3.1.2 o…

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**Author:** ![hrsdawson](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/hrsdawson/32/218_2.png) [@hrsdawson](https://forum.access-hive.org.au/u/hrsdawson)\
**Post date:** [28 November 2025 23:01 UTC](https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620/3 "2025-11-28T23:01:46Z")

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Oops, thanks Aidan. Should have done my due diligence before posting. 🤦‍♀️

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<div class="post-metadata">

**Author:** ![Christopher\_Roach](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/christopher_roach/32/602_2.png) [@Christopher\_Roach](https://forum.access-hive.org.au/u/Christopher_Roach)\
**Post date:** [29 November 2025 07:28 UTC](https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620/4 "2025-11-29T07:28:23Z")

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Downgrade to analysis3-25-05ish… Any older and you run into other problems.

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<div class="post-metadata">

**Author:** ![Aidan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/aidan/32/42_2.png) [@Aidan](https://forum.access-hive.org.au/u/Aidan)\
**Post date:** [1 December 2025 00:35 UTC](https://forum.access-hive.org.au/t/help-running-oceanparcels-using-xp65/5620/5 "2025-12-01T00:35:16Z")

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> [@hrsdawson](#):
>
> Oops, thanks Aidan. Should have done my due diligence before posting.

I doubt it. You both posted about the same issue at almost the same time! Spooky 👻