# Slicer ANTs Registration Failing

**URL:** <https://discourse.slicer.org/t/slicer-ants-registration-failing/45373>\
**Category:** Support\
**Created:** [December 5, 2025, 9:56am UTC](https://discourse.slicer.org/t/slicer-ants-registration-failing/45373 "2025-12-05T09:56:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ThomasVanParys](https://avatars.discourse-cdn.com/v4/letter/t/7ea924/32.png) [@ThomasVanParys](https://discourse.slicer.org/u/ThomasVanParys)\
**Post date:** [December 5, 2025, 9:56am UTC](https://discourse.slicer.org/t/slicer-ants-registration-failing/45373/1 "2025-12-05T09:56:22Z")

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Hello! I have tried to register two nrrd. volumes in ‘G:\Kikopey\_project\ANTs\_Volumes’  
But I have come across this issue, and don’t fully undertsnad how to resolve it:

```auto
Python 3.12.10 (main, Nov 10 2025, 02:47:38) [MSC v.1942 64 bit (AMD64)] on win32
>>> 
[VTK] antsRegistrationCLI standard error:
[VTK] file C:/Users/ImagingLab/AppData/Local/Temp/Slicer/BDBII_vtkMRMLScalarVolumeNodeB.nrrd does not exist . 
[VTK] file C:/Users/ImagingLab/AppData/Local/Temp/Slicer/BDBII_vtkMRMLScalarVolumeNodeC.nrrd does not exist . 
[VTK] antsRegistrationCLI terminated with a fault
[Qt] QPixmap::scaled: Pixmap is a null pixmap

```

Any help would be much appreciated. This is on Slicer 5.10.0.

UPDATE: Do not have both ANTs Resgirstration and SlicerANTsOy plug-ins installed, as it will obscure the template, group-wise, and pair-wise tab options.

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<div class="post-metadata">

**Author:** ![dzenanz](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/dzenanz/32/1992_2.png) [@dzenanz](https://discourse.slicer.org/u/dzenanz)\
**Post date:** [December 8, 2025, 8:23pm UTC](https://discourse.slicer.org/t/slicer-ants-registration-failing/45373/2 "2025-12-08T20:23:43Z")

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I guess that problem was resolved by [Rename antsRegistrationLib to ANTsPyRegistrationLib to avoid conflict… · SlicerMorph/SlicerANTsPy@8b1ce30 · GitHub](https://github.com/SlicerMorph/SlicerANTsPy/commit/8b1ce30c81d3e4b44bd96af8adfbdd9aae39abc3)

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<div class="post-metadata">

**Author:** ![ThomasVanParys](https://avatars.discourse-cdn.com/v4/letter/t/7ea924/32.png) [@ThomasVanParys](https://discourse.slicer.org/u/ThomasVanParys)\
**Post date:** [December 8, 2025, 8:25pm UTC](https://discourse.slicer.org/t/slicer-ants-registration-failing/45373/3 "2025-12-08T20:25:43Z")

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Thank you, I have managed to make it work - And I ended up using SlicerANTsPy in the end.