# Changetracker module is not loaded

**URL:** <https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759>\
**Category:** Support\
**Created:** [May 24, 2021, 12:27pm UTC](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759 "2021-05-24T12:27:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Chenglin\_Zhu](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chenglin_zhu/32/11031_2.png) [@Chenglin\_Zhu](https://discourse.slicer.org/u/Chenglin_Zhu)\
**Post date:** [May 24, 2021, 12:27pm UTC](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759/1 "2021-05-24T12:27:35Z")

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Hello!  
I am new to Slicer. After I installed the ChangeTracker extension and restarted the program, I could not open it from the module menu. The module menu says “Changetracker module is not loaded”.  
Could anyone help me with it?  
Thank you

 ![Screen Shot 2021-05-24 at 2.57.04 PM](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/d/5dff5284b1bdf2aedb256bb2654861925b91b560.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:** [May 24, 2021, 3:58pm UTC](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759/2 "2021-05-24T15:58:18Z")

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Thanks for reporting this. I’ve sent a [pull request](https://github.com/fedorov/ChangeTrackerPy/pull/17) to fix incompatibilities with recent Slicer versions. If the suggested changes get integrated then the extension will be available in the Extensions manager the following day.

Note that Slicer has improved a lot in recent years, therefore there is a good chance you can accomplish the same task using core modules and other extensions (using Segment Editor, Segment Statistics core modules, Segment Registration extension, etc.).

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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:** [May 25, 2021, 3:42am UTC](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759/3 "2021-05-25T03:42:44Z")

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The fix has been integrated, therefore ChangeTracker should be available for latest Slicer Stable Release and latest Slicer Preview Release from tomorrow.

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**Author:** ![Chenglin\_Zhu](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chenglin_zhu/32/11031_2.png) [@Chenglin\_Zhu](https://discourse.slicer.org/u/Chenglin_Zhu)\
**Post date:** [May 25, 2021, 3:58pm UTC](https://discourse.slicer.org/t/changetracker-module-is-not-loaded/17759/4 "2021-05-25T15:58:28Z")

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Thank you for the prompt response!