# slicerIGT extension

**URL:** <https://discourse.slicer.org/t/slicerigt-extension/2278>\
**Category:** Support\
**Created:** [March 9, 2018, 10:43pm UTC](https://discourse.slicer.org/t/slicerigt-extension/2278 "2018-03-09T22:43:07Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Vinny](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/vinny/32/7052_2.png) [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Post date:** [March 9, 2018, 10:43pm UTC](https://discourse.slicer.org/t/slicerigt-extension/2278/1 "2018-03-09T22:43:07Z")

</div>

Hi,

When using Slicer 4.9.0 2018-01-22 version, SlicerIGT cannot be found in the Extensions Manager. I get this message:

No extensions found for win:64-bit, revision: ‘26853’. Please try a different combination

However, when I install Slicer version 4.8.1, SlicerIGT can be found. Any reason for this?

Thanks

---

<div class="post-metadata">

**Author:** ![Vinny](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/vinny/32/7052_2.png) [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Post date:** [March 10, 2018, 4:13am UTC](https://discourse.slicer.org/t/slicerigt-extension/2278/2 "2018-03-10T04:13:53Z")

</div>

I’ve installed tonight’s nightly build (2018-03-09) but still cannot find the SlicerIGT extension. Also fyi, when I type in text in the search bar in the Extensions Manager, sometimes the characters disappear and I have to re-type.

Thanks for your help.

---

<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:** [March 11, 2018, 2:45am UTC](https://discourse.slicer.org/t/slicerigt-extension/2278/3 "2018-03-11T02:45:12Z")

</div>

Slicer nightly (preview) build version is going through major changes in these months, so sometimes certain extensions may fail to build for a few days. Either use latest stable version, or [download Slicer from a few days before](https://www.slicer.org/wiki/Documentation/Nightly/FAQ/General#Where_can_I_download_older_release_of_Slicer_.3F), or wait a few days for the extension to become available again.