# Not sure how to interpret this q2-itsxpress plugin error

**URL:** https://forum.qiime2.org/t/not-sure-how-to-interpret-this-q2-itsxpress-plugin-error/26816
**Category:** ITSxpress
**Tags:** q2-itsxpress
**Created:** [June 18, 2023, 1:13am UTC](https://forum.qiime2.org/t/not-sure-how-to-interpret-this-q2-itsxpress-plugin-error/26816 "2023-06-18T01:13:18Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![colinbrislawn](https://forum.qiime2.org/user_avatar/forum.qiime2.org/colinbrislawn/32/6221_2.png) [@colinbrislawn](https://forum.qiime2.org/u/colinbrislawn)
#### Post date: [June 18, 2023, 7:05pm UTC](https://forum.qiime2.org/t/not-sure-how-to-interpret-this-q2-itsxpress-plugin-error/26816/2 "2023-06-18T19:05:22Z")

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I checked the [ITSexpress tutorial](https://forum.qiime2.org/t/q2-itsxpress-a-tutorial-on-a-qiime-2-plugin-to-trim-its-sequences/5780) and `--p-threads` is shown in the example for `qiime itsxpress trim-pair-output-unmerged`.

I wonder if an older version of vsearch is needed 🤔  
vsearch v2.22.1\_linux\_x86\_64

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