# Ancil file error

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/ancil-file-error/1981>\
**Category:** Unified Model\
**Created:** [21 January 2026 17:24 UTC](https://cms-helpdesk.ncas.ac.uk/t/ancil-file-error/1981 "2026-01-21T17:24:11Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![hannahbryant](https://avatars.discourse-cdn.com/v4/letter/h/b5a626/32.png) [@hannahbryant](https://cms-helpdesk.ncas.ac.uk/u/hannahbryant)\
**Post date:** [22 January 2026 17:17 UTC](https://cms-helpdesk.ncas.ac.uk/t/ancil-file-error/1981/5 "2026-01-22T17:17:06Z")

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Thanks 🙂 I’m not sure if this is the issue, but I’ve noticed my land\_cover\_frac file which I got from Jasmin on another helpdesk ticket here: [2014 timeslice using Archer2 - #8 by hannahbryant](https://cms-helpdesk.ncas.ac.uk/t/2014-timeslice-using-archer2/1938/8) /gws/nopw/j04/cmip6\_prep\_vol1/cmip6\_ancils/data/ancils/model\_derived/ukesm1.0\_historical\_r2i1p1f2\_u-bc292/n96e/clim\_2005-2014 gives me a core dumped error so I think this file is erroneous. Do you know where I might be able to get another copy of this file?

Thanks,

Hannah

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