# Segment comparison error

**URL:** <https://discourse.slicer.org/t/segment-comparison-error/36911>\
**Category:** Support\
**Created:** [June 20, 2024, 6:38am UTC](https://discourse.slicer.org/t/segment-comparison-error/36911 "2024-06-20T06:38:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Piergiorgio\_Gaudioso](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/piergiorgio_gaudioso/32/68592_2.png) [@Piergiorgio\_Gaudioso](https://discourse.slicer.org/u/Piergiorgio_Gaudioso)\
**Post date:** [June 20, 2024, 6:38am UTC](https://discourse.slicer.org/t/segment-comparison-error/36911/1 "2024-06-20T06:38:15Z")

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Hi! I am trying to use SegmentComparison module, but it gives me the error “SegmentComparison module is not loaded”.  
How can I solve it?

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**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [June 21, 2024, 11:34am UTC](https://discourse.slicer.org/t/segment-comparison-error/36911/2 "2024-06-21T11:34:09Z")

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You need to install the SlicerRT extension to have that module.