# SlicerIGT U37 Neuronav Error

**URL:** <https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106>\
**Category:** Support\
**Created:** [August 16, 2025, 4:59pm UTC](https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106 "2025-08-16T16:59:46Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![coldfire85](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/coldfire85/32/80180_2.png) [@coldfire85](https://discourse.slicer.org/u/coldfire85)\
**Post date:** [August 16, 2025, 4:59pm UTC](https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106/1 "2025-08-16T16:59:46Z")

</div>

IM trying to follow the tutorial from Neuronav ppt but i run into this error -

[VTK] Warning: In vtkMRMLMarkupsFiducialNode.h, line 113

[VTK] vtkMRMLMarkupsFiducialNode (0000029120E822D0): vtkMRMLMarkupsFiducialNode::AddFiducialFromArray method is deprecated, please use AddControlPoint instead, Im using slicer 5.8.1 , i understand that this tutorial is old but how to go abbout further?

Thanking in advance.

---

<div class="post-metadata">

**Author:** ![ungi](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ungi/32/78573_2.png) [@ungi](https://discourse.slicer.org/u/ungi)\
**Post date:** [August 17, 2025, 4:08pm UTC](https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106/2 "2025-08-17T16:08:48Z")

</div>

This seems like it’s just a warning and it should allow you to follow the tutorial if you ignore this. Do you have any other error?

---

<div class="post-metadata">

**Author:** ![coldfire85](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/coldfire85/32/80180_2.png) [@coldfire85](https://discourse.slicer.org/u/coldfire85)\
**Post date:** [February 15, 2026, 6:14pm UTC](https://discourse.slicer.org/t/slicerigt-u37-neuronav-error/44106/3 "2026-02-15T18:14:25Z")

</div>

It works , thank you