# Total Segmentator Extension Fails Installation on Slicer 5.12.0

**URL:** <https://discourse.slicer.org/t/total-segmentator-extension-fails-installation-on-slicer-5-12-0/47468>\
**Category:** Development\
**Tags:** totalsegmentator\
**Created:** [June 25, 2026, 7:22pm UTC](https://discourse.slicer.org/t/total-segmentator-extension-fails-installation-on-slicer-5-12-0/47468 "2026-06-25T19:22:46Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![amyers](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/amyers/32/82504_2.png) [@amyers](https://discourse.slicer.org/u/amyers)\
**Post date:** [June 25, 2026, 7:22pm UTC](https://discourse.slicer.org/t/total-segmentator-extension-fails-installation-on-slicer-5-12-0/47468/1 "2026-06-25T19:22:46Z")

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On Windows 11, I just installed Slicer 5.12.0 revision 34621, built 2026-06-24. I was able to install DentalSegmentator, SlicerOpenAnatomy, NNUnet, etc; however, TotalSegmentator failed to install.

This is the error I received: “Failed to retrieve metadata for TotalSegmentator extension” Is it related to [Extension manager hangs and crashes Slicer 5.10 today - #3 by mikebind](https://discourse.slicer.org/t/extension-manager-hangs-and-crashes-slicer-5-10-today/47452/3) ? I read that post, restarted my system and still see the issue. Before restarting, I deleted the old 3D Slicer 5.10.0 files in AppData/Local/slicer.org.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/5/e5ad08bb9f2ae6d36287d2163944c4a01e87d7b6.png)

Is there a log file I can look or configure for a non-development build?

Are there any useful python console debug commands for this situation?

Thanks,  
Alex

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**Author:** ![amyers](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/amyers/32/82504_2.png) [@amyers](https://discourse.slicer.org/u/amyers)\
**Post date:** [July 7, 2026, 1:04pm UTC](https://discourse.slicer.org/t/total-segmentator-extension-fails-installation-on-slicer-5-12-0/47468/2 "2026-07-07T13:04:25Z")

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I just installed TotalSegmentator without the error: “Failed to retrieve metadata for TotalSegmentator extension.” Does anyone think this was an extension manager server error?

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**Author:** ![amyers](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/amyers/32/82504_2.png) [@amyers](https://discourse.slicer.org/u/amyers)\
**Post date:** [July 7, 2026, 3:08pm UTC](https://discourse.slicer.org/t/total-segmentator-extension-fails-installation-on-slicer-5-12-0/47468/3 "2026-07-07T15:08:02Z")

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@lassoan just spoke to me about this and the issue is resolved.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 13, 2026, 1:15pm UTC](https://discourse.slicer.org/t/total-segmentator-extension-fails-installation-on-slicer-5-12-0/47468/4 "2026-07-13T13:15:31Z")

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A post was split to a new topic: [TotalSegmentator failed to install required packages](https://discourse.slicer.org/t/totalsegmentator-failed-to-install-required-packages/47606)