# Extensions for 4.13 R30577 not available fro windows?

**URL:** <https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819>\
**Category:** Development\
**Created:** [February 6, 2022, 4:00am UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819 "2022-02-06T04:00:22Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![MarkusHeller](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/markusheller/32/11046_2.png) [@MarkusHeller](https://discourse.slicer.org/u/MarkusHeller)\
**Post date:** [February 6, 2022, 4:00am UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819/1 "2022-02-06T04:00:22Z")

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Sorry for a possibly silly question - I just downloaded and installed the latest 4.13 version for Windows (R30577) and it seems that none of the extensions is currently available for that platform. Did I just happen to grab that version too early and these are still in the process of being built?

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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:** [February 6, 2022, 4:01am UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819/2 "2022-02-06T04:01:43Z")

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You can see the status of the build in real-time [here](https://slicer.cdash.org/index.php?project=SlicerPreview) (you can go to the previous days, too).

Which extension was that you did not find?

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**Author:** ![MarkusHeller](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/markusheller/32/11046_2.png) [@MarkusHeller](https://discourse.slicer.org/u/MarkusHeller)\
**Post date:** [February 6, 2022, 4:16pm UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819/3 "2022-02-06T16:16:01Z")

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Thanks for the clarification Andras,

I could not find a single extension. All of the extensions I had installed with my previous slicer version appeared greyed out in the extension manager, and the number of available extensions appeared as 0.

That seemed rather strange so I then had a look at the following site:

[https://slicer-packages.kitware.com/#collection/5f4474d0e1d8c75dfc70547e/folder/61fb6e31342a877cb3096f97](https://slicer-packages.kitware.com/#collection/5f4474d0e1d8c75dfc70547e/folder/61fb6e31342a877cb3096f97)

from which I got the impression that not a single windows extension seemed to be available.

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<div class="post-metadata">

**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:** [February 6, 2022, 4:24pm UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819/4 "2022-02-06T16:24:21Z")

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Today’s nightly extension builds are partially complete (see the status [here](https://slicer.cdash.org/index.php?project=SlicerPreview), a good number of extensions are already available. You can either wait a few more hours or use yesterday’s Slicer Preview Release - see details [here](https://slicer.readthedocs.io/en/latest/user_guide/extensions_manager.html#extensions-manager-does-not-show-any-extensions).

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<div class="post-metadata">

**Author:** ![MarkusHeller](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/markusheller/32/11046_2.png) [@MarkusHeller](https://discourse.slicer.org/u/MarkusHeller)\
**Post date:** [February 6, 2022, 4:38pm UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819/5 "2022-02-06T16:38:25Z")

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Ok, understood – I did not realise that the mosr recent application was available already while the extensions were still being built. I know where to check for these being ready now, and can certainly wait a bit.

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<div class="post-metadata">

**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:** [February 6, 2022, 5:28pm UTC](https://discourse.slicer.org/t/extensions-for-4-13-r30577-not-available-fro-windows/21819/6 "2022-02-06T17:28:52Z")

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> [@MarkusHeller](#):
>
> I did not realise that the mosr recent application was available already while the extensions were still being built

I agree, this is not intuitive. We plan to change this, see details here:

> <https://github.com/Slicer/Slicer/issues/4976>
>
> In certain timezones (most of Europe) there is a high chance that people don’t f…ind any extensions for the release they have just downloaded.
> 
> It should be possible to somehow synchronize the time the new Slicer Preview Release package shows up on the download page - with the time when extension builds are complete.
> 
> Maybe it could be as simple as having an embargo period between 10pm EST and 12pm EST: packages that are uploaded during this time would all show up at the end of the period (at 12pm EST).
> 
> See this discussion: https://discourse.slicer.org/t/extension-manager-problems/11946/5?u=lassoan