# Threshold in Segment Editor does not apply Segmentation

**URL:** <https://discourse.slicer.org/t/threshold-in-segment-editor-does-not-apply-segmentation/13937>\
**Category:** Support\
**Tags:** segmentation, threshold\
**Created:** [October 8, 2020, 4:38pm UTC](https://discourse.slicer.org/t/threshold-in-segment-editor-does-not-apply-segmentation/13937 "2020-10-08T16:38:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Fadyed](https://avatars.discourse-cdn.com/v4/letter/f/977dab/32.png) [@Fadyed](https://discourse.slicer.org/u/Fadyed)\
**Post date:** [October 8, 2020, 4:38pm UTC](https://discourse.slicer.org/t/threshold-in-segment-editor-does-not-apply-segmentation/13937/1 "2020-10-08T16:38:54Z")

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Operating system:Win  
Slicer version:4.10.2  
Expected behavior: Apply threshold segmentation after successful preview  
Actual behavior: “Apply” does nothing. segmentation is erased if Module or Tool are switched

 ![Segment Editor](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/0/400a2309a19538a0be155ce47e800c62e17c5675.png)

I never had problems with this before, I have attached the volume info, although i have successfully segmented and used this same dataset several times with no problems. The only change was installing some extensions… please advise.

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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:** [October 8, 2020, 4:43pm UTC](https://discourse.slicer.org/t/threshold-in-segment-editor-does-not-apply-segmentation/13937/2 "2020-10-08T16:43:02Z")

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Please switch to latest stable release (currently 4.11.20200930) and let us know if you still encounter problems.

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<div class="post-metadata">

**Author:** ![Fadyed](https://avatars.discourse-cdn.com/v4/letter/f/977dab/32.png) [@Fadyed](https://discourse.slicer.org/u/Fadyed)\
**Post date:** [October 8, 2020, 4:57pm UTC](https://discourse.slicer.org/t/threshold-in-segment-editor-does-not-apply-segmentation/13937/3 "2020-10-08T16:57:47Z")

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Thank you for responding so quickly.  
After writing my question I disabled all extensions and it worked!  
Forgive me, I did not isolate which of them caused it.  
Anyways I’m glad this problem lead me to sign up here… old happy user 😃