# Bioconductor packages failing to install in Galaxy Europe Interactive R (cannot access repository index)

**URL:** <https://help.galaxyproject.org/t/bioconductor-packages-failing-to-install-in-galaxy-europe-interactive-r-cannot-access-repository-index/18086>\
**Category:** usegalaxy.eu support\
**Tags:** troubleshooting, rstudio\
**Created:** [June 19, 2026, 12:04am UTC](https://help.galaxyproject.org/t/bioconductor-packages-failing-to-install-in-galaxy-europe-interactive-r-cannot-access-repository-index/18086 "2026-06-19T00:04:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![noor\_ali](https://avatars.discourse-cdn.com/v4/letter/n/57b2e6/32.png) [@noor\_ali](https://help.galaxyproject.org/u/noor_ali)\
**Post date:** [June 19, 2026, 12:04am UTC](https://help.galaxyproject.org/t/bioconductor-packages-failing-to-install-in-galaxy-europe-interactive-r-cannot-access-repository-index/18086/1 "2026-06-19T00:04:48Z")

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Hello everyone,

I am currently using the Galaxy Europe Interactive R environment for a single-cell RNA-seq analysis workflow, but I am running into a persistent issue when trying to install Bioconductor packages.

## **Problem**

When I try to install packages such as:

- DropletUtils
- scDblFinder
- SingleCellExperiment

the installation fails with repeated errors indicating that R cannot access the Bioconductor repository index.

## **Error message**

cannot open URL ‘[https://bioconductor.org/packages/3.20/bioc/src/contrib/PACKAGES](https://bioconductor.org/packages/3.20/bioc/src/contrib/PACKAGES)’

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<div class="post-metadata">

**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:** [July 28, 2026, 9:15pm UTC](https://help.galaxyproject.org/t/bioconductor-packages-failing-to-install-in-galaxy-europe-interactive-r-cannot-access-repository-index/18086/2 "2026-07-28T21:15:01Z")

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Hi @noor_ali

Are you still having problems? The UseGalaxy servers had a few technical issues and maintenance events last month (maybe you saw those other topics?). Most should be resolved by now. If there is a persistent issue, we can get some clarity now.

Sharing the entire install command and the full error message that results would be one place to start.

Please let us know! 🙂