# Previously available extensions no longer available on 5.2.2

**URL:** <https://discourse.slicer.org/t/previously-available-extensions-no-longer-available-on-5-2-2/30226>\
**Category:** Support\
**Tags:** extensions-manager, extensions\
**Created:** [June 26, 2023, 2:15am UTC](https://discourse.slicer.org/t/previously-available-extensions-no-longer-available-on-5-2-2/30226 "2023-06-26T02:15:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jhlegarreta](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jhlegarreta/32/66542_2.png) [@jhlegarreta](https://discourse.slicer.org/u/jhlegarreta)\
**Post date:** [June 26, 2023, 2:15am UTC](https://discourse.slicer.org/t/previously-available-extensions-no-longer-available-on-5-2-2/30226/1 "2023-06-26T02:15:25Z")

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Hi,  
I am using 3D Slicer 5.2.2 r31382 / fb46bd1, and when trying to install the following extensions it seems like the do not exist in the extension database (no match is shown), and thus cannot be installed:

- DTI-Reg
- DTIAtlasBuilder
- DTIAtlasFiberAnalyzer
- DTIProcess

Is this expected? How can it be fixed (sticking to the above Slicer version)?

I am using Slicer on an Ubuntu 22.04 machine.

These extensions were available in previous Slicer versions (at least, 4.10.2 to my knowledge).

Thanks for developing and maintaining Slicer.

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [June 26, 2023, 2:28am UTC](https://discourse.slicer.org/t/previously-available-extensions-no-longer-available-on-5-2-2/30226/2 "2023-06-26T02:28:48Z")

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These DTI extensions were removed from the Slicer Extensions Manager in March 2022 because the builds had been failing for quite some time with no developer available to maintain the projects.

See the following

> **[ExtensionsIndex/ARCHIVE at main · Slicer/ExtensionsIndex - Optional extension documentation:](https://github.com/Slicer/ExtensionsIndex/tree/main/ARCHIVE#optional-extension-documentation)**
>
> main/ARCHIVE

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<div class="post-metadata">

**Author:** ![jhlegarreta](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jhlegarreta/32/66542_2.png) [@jhlegarreta](https://discourse.slicer.org/u/jhlegarreta)\
**Post date:** [June 26, 2023, 1:47pm UTC](https://discourse.slicer.org/t/previously-available-extensions-no-longer-available-on-5-2-2/30226/3 "2023-06-26T13:47:47Z")

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OK, thanks for the answer James.