# Cannot find SlicerIGT in extensions library

**URL:** <https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112>\
**Category:** Support\
**Created:** [February 19, 2018, 1:44am UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112 "2018-02-19T01:44:04Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Prashant\_Pandey](https://avatars.discourse-cdn.com/v4/letter/p/c0e974/32.png) [@Prashant\_Pandey](https://discourse.slicer.org/u/Prashant_Pandey)\
**Post date:** [February 19, 2018, 1:44am UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/1 "2018-02-19T01:44:04Z")

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I’m using Slicer 4.9.0 2018-01-24, and wanted to install the SlicerIGT module, but I can’t find it in the extensions manager. I remember that it was available for older versions of Slicer.

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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 19, 2018, 2:05am UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/2 "2018-02-19T02:05:37Z")

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Use 4.8.1 or the latest nightly version.

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**Author:** ![Prashant\_Pandey](https://avatars.discourse-cdn.com/v4/letter/p/c0e974/32.png) [@Prashant\_Pandey](https://discourse.slicer.org/u/Prashant_Pandey)\
**Post date:** [February 19, 2018, 7:47pm UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/3 "2018-02-19T19:47:22Z")

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Thanks, using 4.8.1 worked.

As an aside I also found that MatlabBridge does not work with the nightly version, it gives the error that cli-modules/MatlabCommander.exe does not exist.

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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 19, 2018, 11:08pm UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/4 "2018-02-19T23:08:44Z")

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> [@Prashant\_Pandey](#):
>
> it gives the error that cli-modules/MatlabCommander.exe does not exist.

Could you please copy-paste here the application log? (menu: Help / Report a bug)

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**Author:** ![Prashant\_Pandey](https://avatars.discourse-cdn.com/v4/letter/p/c0e974/32.png) [@Prashant\_Pandey](https://discourse.slicer.org/u/Prashant_Pandey)\
**Post date:** [February 21, 2018, 4:45pm UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/5 "2018-02-21T16:45:19Z")

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Unfortunately I uninstalled nightly Slicer so I cannot go back and look at the error logs, but essentially the problem was that the MatlabBridge/cli-modules sub-folder did not exist.

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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 21, 2018, 4:56pm UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/6 "2018-02-21T16:56:36Z")

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I was able to reproduce the problem and I expect to fix it today.

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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 21, 2018, 5:15pm UTC](https://discourse.slicer.org/t/cannot-find-slicerigt-in-extensions-library/2112/7 "2018-02-21T17:15:25Z")

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I’ve fixed the issue (the extension needs OpenIGTLink and this library was moved out from the Slicer core to the SlicerOpenIGTLink extension). Everything should work correctly again in nightly builds that you download tomorrow or later.