# Threshold range in 3D Slicer is \[0, 99\]

**URL:** https://discourse.slicer.org/t/threshold-range-in-3d-slicer-is-0-99/7760
**Category:** Support
**Tags:** segmentation
**Created:** [July 25, 2019, 6:21pm UTC](https://discourse.slicer.org/t/threshold-range-in-3d-slicer-is-0-99/7760 "2019-07-25T18:21:05Z")
**Posts on this page:** 1
**Showing post:** 16

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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: [November 4, 2019, 11:57am UTC](https://discourse.slicer.org/t/threshold-range-in-3d-slicer-is-0-99/7760/16 "2019-11-04T11:57:43Z")

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Task manager shows that you are running out of memory. The error message tells the same. Configure 50-100GB more virtual memory or crop and/or downsanple the image before starting segmentation.

The flag allows you to indicate for yourself that you a segment is correct and complete. It is essential when you have hundreds of segments. See details here: [New feature: Search and filter in segments table](https://discourse.slicer.org/t/new-feature-search-and-filter-in-segments-table/7827)

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