# pair ended demultiplexed qza file causing strange error.

**URL:** https://forum.qiime2.org/t/pair-ended-demultiplexed-qza-file-causing-strange-error/33876
**Category:** Technical Support
**Tags:** dada2, demux
**Created:** [December 26, 2025, 5:46am UTC](https://forum.qiime2.org/t/pair-ended-demultiplexed-qza-file-causing-strange-error/33876 "2025-12-26T05:46:55Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![gregcaporaso](https://forum.qiime2.org/user_avatar/forum.qiime2.org/gregcaporaso/32/17769_2.png) [@gregcaporaso](https://forum.qiime2.org/u/gregcaporaso)
#### Post date: [December 28, 2025, 8:31pm UTC](https://forum.qiime2.org/t/pair-ended-demultiplexed-qza-file-causing-strange-error/33876/2 "2025-12-28T20:31:43Z")

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@Joely_Corrales, This is resulting from a bug that has been fixed for the 2026.1 release. See [this discussion](https://forum.qiime2.org/t/demux-summarize-broken-after-upgrading-from-2025-7-to-2025-10/33852). The best workaround I have right now would be to install 2025.7 and work with that for this step - if you're stuck we may be able to help with another option when we're all back in the office the week of Jan 5.

Sorry for the trouble!

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