# IGSTK repository can't find for older version of slicer 4.8.1

**URL:** <https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808>\
**Category:** Development\
**Created:** [August 16, 2018, 10:20pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808 "2018-08-16T22:20:28Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![kamrul079](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kamrul079/32/2059_2.png) [@kamrul079](https://discourse.slicer.org/u/kamrul079)\
**Post date:** [August 16, 2018, 10:20pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/1 "2018-08-16T22:20:28Z")

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I am trying to use webcams or NDI tracking device with my already built module in slicer. I need to build IGSTK. But I could n’t find the repository for IGSTK. I need that version of IGSTK that will compatible with slicer 4.8.1 version. I need the repository of IGSTK to build that for tracking.

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**Author:** ![Andinet\_Enquobahrie](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/andinet_enquobahrie/32/75_2.png) [@Andinet\_Enquobahrie](https://discourse.slicer.org/u/Andinet_Enquobahrie)\
**Post date:** [August 16, 2018, 11:33pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/2 "2018-08-16T23:33:49Z")

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Several of IGSTK’s functionalities are available in SlicerIGT and PLUS modules. IGSTK has not been updated for years. I strongly recommend migrating your application to use SlicerIGT and PLUS modules instead

Checkout some tutorial material including tracking device interfacing

[http://www.slicerigt.org/wp/user-tutorial/](http://www.slicerigt.org/wp/user-tutorial/)

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**Author:** ![kamrul079](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kamrul079/32/2059_2.png) [@kamrul079](https://discourse.slicer.org/u/kamrul079)\
**Post date:** [August 17, 2018, 3:23pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/3 "2018-08-17T15:23:19Z")

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@Andinet_Enquobahrie thank you for your suggestion. Unfortunately, I can not be able to add the “SlicerIGT” extension with my slicer 4.8.1 that I had built from the source.

 ![Capture](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/1/41d12a2f6b649d1ac7d27d90bcc1b162ec8fd261.png)

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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:** [August 17, 2018, 5:14pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/4 "2018-08-17T17:14:32Z")

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If you build Slicer then you need to build all the extensions that you need. Once you have built Slicer, building extensions is very simple.

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**Author:** ![kamrul079](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kamrul079/32/2059_2.png) [@kamrul079](https://discourse.slicer.org/u/kamrul079)\
**Post date:** [August 17, 2018, 6:50pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/7 "2018-08-17T18:50:38Z")

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I had built SlicerIGT module in slicer 4.8.1. As shown in the tutorial that under IGT category, a new “Sequences” category would exist but in my case, there is no “sequences”.

 ![slicerigtt](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/8/98895aa61a4690d775fa2f5835cc9a1967e05489.png)

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [August 17, 2018, 11:02pm UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/8 "2018-08-17T23:02:09Z")

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Refer to the Slide right before the one you posted above. It says to install the following extensions “SlicerIGT” and “Sequences”. You probably haven’t built the [Sequences](https://github.com/SlicerRt/Sequences) extension and that is why it is not showing in the module browser.

 ![SlicerIGT_tutorial_screenshot](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/f/efa2e6246d70624f9c3642739fb4ce9f16bf58bc.jpeg)

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**Author:** ![kamrul079](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kamrul079/32/2059_2.png) [@kamrul079](https://discourse.slicer.org/u/kamrul079)\
**Post date:** [August 19, 2018, 12:38am UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/9 "2018-08-19T00:38:46Z")

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Which version of “Sequence” I should build for slicer 4.8.1? What do you think?

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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:** [August 19, 2018, 6:37am UTC](https://discourse.slicer.org/t/igstk-repository-cant-find-for-older-version-of-slicer-4-8-1/3808/10 "2018-08-19T06:37:48Z")

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See repository url and tag/branch/hash for all extensions for Slicer 4.8: [https://github.com/Slicer/ExtensionsIndex/tree/4.8](https://github.com/Slicer/ExtensionsIndex/tree/4.8)

If an extension fails to build, report it at the extension’s bugtracker. If you don’t get response then you can post the problem on this forum (in a new topic for each problem).