# Errors occurred in the extraction of vascular centerlines from CT images

**URL:** <https://discourse.slicer.org/t/errors-occurred-in-the-extraction-of-vascular-centerlines-from-ct-images/14320>\
**Category:** Support\
**Created:** [October 30, 2020, 3:59am UTC](https://discourse.slicer.org/t/errors-occurred-in-the-extraction-of-vascular-centerlines-from-ct-images/14320 "2020-10-30T03:59:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Chefy21](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@Chefy21](https://discourse.slicer.org/u/Chefy21)\
**Post date:** [October 30, 2020, 3:59am UTC](https://discourse.slicer.org/t/errors-occurred-in-the-extraction-of-vascular-centerlines-from-ct-images/14320/1 "2020-10-30T03:59:30Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/8/a82d77c03bb517772e26848f87c03dfc885c0be4.png)  
When using this software, I met two problems and asked for solutions…

1. Cannot click Start while segmenting the blood vessel.
2. An error was reported when using the model to calculate the centerline of the vessel.

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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 30, 2020, 4:15am UTC](https://discourse.slicer.org/t/errors-occurred-in-the-extraction-of-vascular-centerlines-from-ct-images/14320/2 "2020-10-30T04:15:18Z")

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> [@Chefy21](#):
>
> Cannot click Start while segmenting the blood vessel

You need to click “Preview” first.

> [@Chefy21](#):
>
> An error was reported when using the model to calculate the centerline of the vessel.

What was the error message exactly? Where was it reported?