# vtkm Extension: Cannot Place Fiducial

**URL:** <https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735>\
**Category:** Support\
**Created:** [September 18, 2021, 1:54am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735 "2021-09-18T01:54:39Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![adamgranthendry](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamgranthendry/32/12180_2.png) [@adamgranthendry](https://discourse.slicer.org/u/adamgranthendry)\
**Post date:** [September 18, 2021, 1:54am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/1 "2021-09-18T01:54:39Z")

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### Problem:

I cannot place fiducials on my 3D STL model for extracting centerlines. Please let me know if I am performing a step incorrectly.

### System:

**OS:** Windows 10  
**3D Slicer:** 4.10.2

### Steps to Reproduce

1. Choose file to add (`data.stl`)  
 ![image](https://user-images.githubusercontent.com/77850046/133849893-3a8f2661-6fca-49fe-99c2-f908159b02bf.png)

2. Load the data as a `Model`  
 ![image](https://user-images.githubusercontent.com/77850046/133850043-d9a23ffc-f6d5-40cc-a4da-ae89217bb3e2.png)

3. Convert Model to Segmentation Node

![image](https://user-images.githubusercontent.com/77850046/133850270-e31d9c48-5487-431e-a818-eec29ac8098c.png)

1. Open the Centerline Computation module

![image](https://user-images.githubusercontent.com/77850046/133850415-37a4848e-9c43-4ed4-9b69-91a5b87772a7.png)

1. Choose `data` as the `Vessel tree model` and choose `Create new MarkupsFiducial`

![image](https://user-images.githubusercontent.com/77850046/133850574-89470319-ab7f-4b70-b1b5-c18fe03c45a1.png)

1. Fiducial does not appear when attempting to add to model

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<div class="post-metadata">

**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:** [September 18, 2021, 1:56am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/2 "2021-09-18T01:56:07Z")

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Slicer-4.10 is very old. Please use latest Slicer Stable Release or latest Slicer Preview Release and let us know if you run into any problems.

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<div class="post-metadata">

**Author:** ![adamgranthendry](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamgranthendry/32/12180_2.png) [@adamgranthendry](https://discourse.slicer.org/u/adamgranthendry)\
**Post date:** [September 18, 2021, 1:59am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/3 "2021-09-18T01:59:38Z")

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The only reason I used 4.10 is because 4.10.1, 4.10.2, 4.11, and the master branch have not worked.

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<div class="post-metadata">

**Author:** ![adamgranthendry](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamgranthendry/32/12180_2.png) [@adamgranthendry](https://discourse.slicer.org/u/adamgranthendry)\
**Post date:** [September 18, 2021, 2:00am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/4 "2021-09-18T02:00:46Z")

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I started at master and worked my way back. By version 4.10.1, I decided it was time to post an issue.

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<div class="post-metadata">

**Author:** ![adamgranthendry](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamgranthendry/32/12180_2.png) [@adamgranthendry](https://discourse.slicer.org/u/adamgranthendry)\
**Post date:** [September 18, 2021, 2:33am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/5 "2021-09-18T02:33:07Z")

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Should I try 4.11.20210226?

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<div class="post-metadata">

**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:** [September 18, 2021, 2:33am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/6 "2021-09-18T02:33:39Z")

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I would recommend the latest Slicer Preview Release Slicer-4.13-2021-09-16.

Hit Ctrl-F top open the module finder and type “extract”, then choose “Extract centerline” module.

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<div class="post-metadata">

**Author:** ![adamgranthendry](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamgranthendry/32/12180_2.png) [@adamgranthendry](https://discourse.slicer.org/u/adamgranthendry)\
**Post date:** [September 18, 2021, 2:34am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/7 "2021-09-18T02:34:22Z")

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Will do. Please give me a moment to install.

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<div class="post-metadata">

**Author:** ![adamgranthendry](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/adamgranthendry/32/12180_2.png) [@adamgranthendry](https://discourse.slicer.org/u/adamgranthendry)\
**Post date:** [September 18, 2021, 2:54am UTC](https://discourse.slicer.org/t/vtkm-extension-cannot-place-fiducial/19735/8 "2021-09-18T02:54:36Z")

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I can confirm fiducials appear with Slicer Preview Release Slicer-4.13-2021-09-17