# DeCA module does not operate under the 5-4-2026.01.02 release

**URL:** <https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782>\
**Category:** Support\
**Created:** [January 15, 2026, 9:20am UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782 "2026-01-15T09:20:56Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![philippepellerin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/philippepellerin/32/16062_2.png) [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Post date:** [January 15, 2026, 9:20am UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/1 "2026-01-15T09:20:56Z")

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I tried running DeCA with the 3D Slicer 5-11-2026.01.02 release, but the module window opens like in the attachment, and the extension can’t be operated.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/f/6f4b0c0e7d4446dfe09a349e92da446e82d415ac.png)

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**Author:** ![ebrahim](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ebrahim/32/13403_2.png) [@ebrahim](https://discourse.slicer.org/u/ebrahim)\
**Post date:** [January 15, 2026, 2:04pm UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/2 "2026-01-15T14:04:10Z")

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In the screenshot it looks like you are in the Data module. What happens when you try switching to one of the DeCA modules?

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**Author:** ![philippepellerin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/philippepellerin/32/16062_2.png) [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Post date:** [January 15, 2026, 3:45pm UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/3 "2026-01-15T15:45:56Z")

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Sorry, I did not capture the right screen; here is a better one. When I switch to the DeCA module, I do not see the options to select the models and landmarks folders, thus can’t operate a DeCA atlas creation….

 ![PastedGraphic-1.png](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/7/d/7d50a2a112753fdfd91f2a926671f4bfc2ff9f6a.png)

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**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [January 15, 2026, 4:53pm UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/4 "2026-01-15T16:53:27Z")

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I can’t replicate this on my Mac with todays preview. Module shows and works fine:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/8/a8875f70c56333bf706ef41dfbda149f5a56c136.png)

There might be an issue with that specific build from that day. If you need to use it try with today’s preview, better yet use the stable (5.10).

If you encounter the issue with today’s preview as well, please share the full log file from that session.

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**Author:** ![philippepellerin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/philippepellerin/32/16062_2.png) [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Post date:** [January 16, 2026, 3:27pm UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/5 "2026-01-16T15:27:24Z")

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With the last issue I can’t even load the module.

Here after a screen grab of the research display.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/8/581f18ef4c168c24bb818a20b13414510ff03fbd.jpeg)

I copy here after the session.

Python 3.12.10 (main, Jan 14 2026, 23:49:19) [Clang 17.0.0 (clang-1700.6.3.2)] on darwin

\>\>\>

[Python] get\_frame\_offsets is deprecated and will be removed in v4.0

[Qt] libpng warning: iCCP: profile ‘ICC Profile’: ‘CMYK’: invalid ICC profile color space

Collecting git+https://github.com/SlicerMorph/dataset-matcher.git

Cloning [GitHub - SlicerMorph/dataset-matcher: A lightweight Python library for matching datasets (file lists) by basename across directories](https://github.com/SlicerMorph/dataset-matcher.git) to /private/var/folders/xw/49j5chs13nl\_nzll7509jd5h0000gn/T/pip-req-build-aeuthwvj

Running command git clone --filter=blob:none --quiet [GitHub - SlicerMorph/dataset-matcher: A lightweight Python library for matching datasets (file lists) by basename across directories](https://github.com/SlicerMorph/dataset-matcher.git) /private/var/folders/xw/49j5chs13nl\_nzll7509jd5h0000gn/T/pip-req-build-aeuthwvj

Resolved [GitHub - SlicerMorph/dataset-matcher: A lightweight Python library for matching datasets (file lists) by basename across directories](https://github.com/SlicerMorph/dataset-matcher.git) to commit 8b14a56d598952fd4da3f2bfbf827c697a8d9f81

Installing build dependencies: started

Installing build dependencies: finished with status ‘done’

Getting requirements to build wheel: started

Getting requirements to build wheel: finished with status ‘done’

Preparing metadata (pyproject.toml): started

Preparing metadata (pyproject.toml): finished with status ‘done’

Building wheels for collected packages: dataset-matcher

Building wheel for dataset-matcher (pyproject.toml): started

Building wheel for dataset-matcher (pyproject.toml): finished with status ‘done’

Created wheel for dataset-matcher: filename=dataset\_matcher-0.1.0-py3-none-any.whl size=8513 sha256=3950b04006d36514218b86debb6fc00d97444e16b5c7e42271c5eb709293ac3c

Stored in directory: /private/var/folders/xw/49j5chs13nl\_nzll7509jd5h0000gn/T/pip-ephem-wheel-cache-6pvs1xkv/wheels/b4/0a/87/bf155e2f13d7fed2f6ecc8572258f8e2091e9bdcbf12363c9e

Successfully built dataset-matcher

Installing collected packages: dataset-matcher

Successfully installed dataset-matcher-0.1.0

[Qt] libpng warning: iCCP: known incorrect sRGB profile

Collecting mistune

Using cached mistune-3.2.0-py3-none-any.whl.metadata (1.9 kB)

Using cached mistune-3.2.0-py3-none-any.whl (53 kB)

Installing collected packages: mistune

Successfully installed mistune-3.2.0

[VTK] Warning: In vtkSlicerTerminologiesModuleLogic.cxx, line 3370

[VTK] vtkSlicerTerminologiesModuleLogic (0x6000003f4680): LoadAnatomicContextFromFile is deprecated. Use LoadRegionContextFromFile instead.

[FD] [47392:137219:0116/161113.945652:ERROR:gl\_context\_cgl.cc(118)] Error creating context.

[Qt] Property ‘verbose’’ of object ‘qSlicerWebPythonProxy’ has no notify signal and is not constant, value updates in HTML will be broken!

[Qt] Property ‘verbose’’ of object ‘qSlicerWebPythonProxy’ has no notify signal and is not constant, value updates in HTML will be broken!

[FD] [47392:157443:0116/161122.043137:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161125.101992:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161141.446527:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161144.503438:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161150.729947:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161153.785437:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161320.891331:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161323.946523:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161403.693959:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161406.749718:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161707.086846:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[FD] [47392:157443:0116/161710.144168:ERROR:ssl\_client\_socket\_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net\_error -100

[Qt] Populating font family aliases took 175 ms. Replace uses of missing font family “Courier” with one that exists to avoid this cost.

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<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [January 16, 2026, 5:12pm UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/6 "2026-01-16T17:12:20Z")

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> [@philippepellerin](#):
>
> Here after a screen grab of the research display.

Extension is called DenseCorrespondenceAnalysis (not DeCA). Search for Dense and it should come up

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**Author:** ![philippepellerin](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/philippepellerin/32/16062_2.png) [@philippepellerin](https://discourse.slicer.org/u/philippepellerin)\
**Post date:** [January 17, 2026, 9:53am UTC](https://discourse.slicer.org/t/deca-module-does-not-operate-under-the-5-4-2026-01-02-release/45782/7 "2026-01-17T09:53:06Z")

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Thank you, everything is going well.  
Best.