# Retrieve\_ozone job failing

**URL:** <https://forum.access-hive.org.au/t/retrieve-ozone-job-failing/6252>\
**Category:** Coupled Model\
**Tags:** help\
**Created:** [10 April 2026 04:20 UTC](https://forum.access-hive.org.au/t/retrieve-ozone-job-failing/6252 "2026-04-10T04:20:28Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![zoegillett27](https://avatars.discourse-cdn.com/v4/letter/z/74df32/32.png) [@zoegillett27](https://forum.access-hive.org.au/u/zoegillett27)\
**Post date:** [10 April 2026 04:20 UTC](https://forum.access-hive.org.au/t/retrieve-ozone-job-failing/6252/1 "2026-04-10T04:20:28Z")

</div>

Hi all,

I’m trying to run a historical ACCESS-CM2 suite and I’m getting an error in the `retrieve_ozone` job, which I think is related to the new Conda environment `conda/analysis3-26.03`.

This is the error:

```auto
Traceback (most recent call last):
File “/g/data/access/projects/access/apps/pythonlib/umfile_utils/access_cm2/um_fields_subset.py”, line 68, in 
f = umfile.UMFile(ifile)
^^^^^^^^^^^^^^^^^^^^
File “/g/data/access/projects/access/apps/pythonlib/umfile_utils/access_cm2/umfile.py”, line 27, in **init**
self.determine_file_type()
File “/g/data/access/projects/access/apps/pythonlib/umfile_utils/access_cm2/umfile.py”, line 68, in determine_file_type
h = np.fromstring(s,np.int64).newbyteorder(endian)
^^^^^^^^^^^^^^^^^^^^^^^^^

ValueError: The binary mode of fromstring is removed, use frombuffer instead
Traceback (most recent call last):
File “/g/data/access/projects/access/apps/pythonlib/umfile_utils/access_cm2/um2netcdf4.py”, line 4, in 
import cf_units, cftime, mule
ModuleNotFoundError: No module named ‘mule’

```

It’s similar to the issue described [here](https://forum.access-hive.org.au/t/am3-netcdf-conversion-failing-temporary-fix/6208).

I tried adding

```auto
module use /g/data/xp65/public/modules
module load conda/analysis3-25.08

```

to the `pre-script` of `[[retrieve_ozone]]` in `ozone.rc`, but the latest Conda environment is still loaded after that.

If I remove

```auto
module use ~access/modules
module load pythonlib/umfile_utils/access_cm2_xp65

```

from the `pre-script`, the job just times out.

I last ran the suite late last year.

Can the `/g/data/access/modules/pythonlib/umfile_utils/access_cm2_xp65` file be edited to load an older Conda environment instead? Or is there another workaround I could try?

Thanks,  
Zoe

---

<div class="post-metadata">

**Author:** ![lachlanswhyborn](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/lachlanswhyborn/32/1837_2.png) [@lachlanswhyborn](https://forum.access-hive.org.au/u/lachlanswhyborn)\
**Post date:** [10 April 2026 06:10 UTC](https://forum.access-hive.org.au/t/retrieve-ozone-job-failing/6252/2 "2026-04-10T06:10:57Z")

</div>

Easiest temporary workaround would be to make a temporary copy of that modulefile and specify `conda/analysis3-25.08` in the `module load`, then load that. I’ll ping someone with admin rights in `/g/data/access` to make that fix in the original.

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<div class="post-metadata">

**Author:** ![lachlanswhyborn](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/lachlanswhyborn/32/1837_2.png) [@lachlanswhyborn](https://forum.access-hive.org.au/u/lachlanswhyborn)\
**Post date:** [10 April 2026 06:14 UTC](https://forum.access-hive.org.au/t/retrieve-ozone-job-failing/6252/3 "2026-04-10T06:14:58Z")

</div>

Should now be fixed- if problems persist, please ping me and I’ll dig a bit deeper.

---

<div class="post-metadata">

**Author:** ![zoegillett27](https://avatars.discourse-cdn.com/v4/letter/z/74df32/32.png) [@zoegillett27](https://forum.access-hive.org.au/u/zoegillett27)\
**Post date:** [13 April 2026 00:06 UTC](https://forum.access-hive.org.au/t/retrieve-ozone-job-failing/6252/4 "2026-04-13T00:06:35Z")

</div>

Thanks for your quick response, Lachlan, that fixed the issue!