# 3D slicer 5.10 SlicerSPECTRecon Critical warning: this will cause errors after 2025-11-30

**URL:** <https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132>\
**Category:** Support\
**Tags:** extensions-manager, python, spect\
**Created:** [February 12, 2026, 7:06am UTC](https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132 "2026-02-12T07:06:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![macp970617](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/macp970617/32/81950_2.png) [@macp970617](https://discourse.slicer.org/u/macp970617)\
**Post date:** [February 12, 2026, 7:06am UTC](https://discourse.slicer.org/t/3d-slicer-5-10-slicerspectrecon-critical-warning-this-will-cause-errors-after-2025-11-30/46132/1 "2026-02-12T07:06:14Z")

</div>

Applications/Slicer.app/Contents/Extensions-34045/SPECTRecon/lib/Slicer-5.10/qt-scripted-modules/SPECTRecon.py:3: UserWarning: pkg\_resources is deprecated as an API. See [https://setuptools.pypa.io/en/latest/pkg\_resources.html](https://setuptools.pypa.io/en/latest/pkg_resources.html). The pkg\_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools\<81.

import pkg\_resources