# IGV visualization fail

**URL:** https://help.galaxyproject.org/t/igv-visualization-fail/18354
**Category:** Uncategorized
**Created:** [August 27, 2026, 3:07pm UTC](https://help.galaxyproject.org/t/igv-visualization-fail/18354 "2026-08-27T15:07:31Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![scholtz](https://avatars.discourse-cdn.com/v4/letter/s/22d042/32.png) [@scholtz](https://help.galaxyproject.org/u/scholtz)
#### Post date: [August 27, 2026, 3:07pm UTC](https://help.galaxyproject.org/t/igv-visualization-fail/18354/1 "2026-08-27T15:07:31Z")

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I tried to visualize my aligned files (merged bam, generated with RNA STAR) directly from [Galaxy.eu](http://Galaxy.eu) with local IGV, but received the following warning from IGV: Error message: Unknown BAM index file type: null in null. No aligned reads are visualized, of course. I last worked with these same files a month ago, visualization was successful. Might this be a recent problem with Galaxy? Or with IGV? Thanks for your help. Beata

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### Author: ![jennaj](https://sea2.discourse-cdn.com/flex020/user_avatar/help.galaxyproject.org/jennaj/32/27_2.png) [@jennaj](https://help.galaxyproject.org/u/jennaj)
#### Post date: [August 31, 2026, 4:10pm UTC](https://help.galaxyproject.org/t/igv-visualization-fail/18354/2 "2026-08-31T16:10:52Z")

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Hi @scholtz

I can reproduce the problem with a `local host` error.

- [https://usegalaxy.eu/u/jenj/h/test-srr11296739-qa-and-mapping](https://usegalaxy.eu/u/jenj/h/test-srr11296739-qa-and-mapping) → [https://usegalaxy.eu/datasets/26c75dcccb616ac8eeedebd5318088da/visualize](https://usegalaxy.eu/datasets/26c75dcccb616ac8eeedebd5318088da/visualize) → see Visualize tab

HI @Gabriel are there any known issues with IGV local for now? Thanks! 🙂