# Error on iqtree step

**URL:** https://forum.biobakery.org/t/error-on-iqtree-step/2472
**Category:** PhyloPhlAn
**Created:** [August 9, 2021, 4:59pm UTC](https://forum.biobakery.org/t/error-on-iqtree-step/2472 "2021-08-09T16:59:41Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![rnc8](https://avatars.discourse-cdn.com/v4/letter/r/8797f3/32.png) [@rnc8](https://forum.biobakery.org/u/rnc8)
#### Post date: [August 12, 2021, 5:23pm UTC](https://forum.biobakery.org/t/error-on-iqtree-step/2472/5 "2021-08-12T17:23:06Z")

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Hi Francesco,

I’ll try downloading the updated code and running it once. My guess is it’s the same issue as was posted previously (I hadn’t seen it until just now): [Supermatrix alignment has varying length -\> error in tree build](https://forum.biobakery.org/t/supermatrix-alignment-has-varying-length-error-in-tree-build/1488).  
I only ran the program once, so I don’t think it’s an issue with cleaning broken files.

Thanks,  
Becca

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