# Install extensions

**URL:** <https://discourse.slicer.org/t/install-extensions/26528>\
**Category:** Support\
**Created:** [December 1, 2022, 4:02am UTC](https://discourse.slicer.org/t/install-extensions/26528 "2022-12-01T04:02:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Mohamed1](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mohamed1/32/17472_2.png) [@Mohamed1](https://discourse.slicer.org/u/Mohamed1)\
**Post date:** [December 1, 2022, 4:02am UTC](https://discourse.slicer.org/t/install-extensions/26528/1 "2022-12-01T04:02:39Z")

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Hey dears 3D slicer supporters  
First of all thank you all for your tremendous support.  
today I want to ask about the tissueSegmentation extension, I have already installed it, and once I go to choose it from the modules windows, it said the extension was not uploaded. however, in the extension manager it appears as an installed extension.  
please any help with that  
Thank you very much!

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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:** [December 1, 2022, 4:45am UTC](https://discourse.slicer.org/t/install-extensions/26528/2 "2022-12-01T04:45:17Z")

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The initialization of the tissue segmentation module was broken. I’ve submitted a pull request to get it fixed:

> <https://github.com/MarinaSandonis/SlicerTissueSegmentation/pull/1>
>
> Fixes the problem reported here: https://discourse.slicer.org/t/install-extensio…ns/26528
> 
> pip\_install must not be called from the main namespace of a script because that may take long time and it is always executed (even if the user does not even open the module)