# Segmentation error

**URL:** <https://discourse.slicer.org/t/segmentation-error/1579>\
**Category:** Support\
**Created:** [December 2, 2017, 10:51pm UTC](https://discourse.slicer.org/t/segmentation-error/1579 "2017-12-02T22:51:49Z")\
**Posts on this page:** 1\
**Showing post:** 2

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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:** [December 3, 2017, 12:02am UTC](https://discourse.slicer.org/t/segmentation-error/1579/2 "2017-12-03T00:02:45Z")

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This happens when you paint on oblique slices: you either you’ve changed the slice orientation (not likely) or your image was acquired with tilted axes. See this post for instructions how to edit such images: [Segmentation Editor - How to disable painting on adjacent slices?](https://discourse.slicer.org/t/segmentation-editor-how-to-disable-painting-on-adjacent-slices/1459/4)

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