# Fiducial Registration Wizard Module not loading
**URL:** https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513
**Category:** Support
**Created:** [September 2, 2023, 1:21am UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513 "2023-09-02T01:21:22Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Jayme\_Goodrum](https://discourse.slicer.org/u/Jayme_Goodrum)
#### Post date: [September 2, 2023, 1:21am UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/1 "2023-09-02T01:21:22Z")
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### Author:  [@Jayme\_Goodrum](https://discourse.slicer.org/u/Jayme_Goodrum)
#### Post date: [September 2, 2023, 1:55am UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/2 "2023-09-02T01:55:36Z")
this is what comes up in the terminal
Last login: Fri Sep 1 19:51:13 on ttys000
/Applications/Slicer.app/Contents/Extensions-31938/SlicerIGT/lib/Slicer-5.4/qt-loadable-modules/libqSlicerFiducialRegistrationWizardModule.dylib ; exit;
(base) jaymegoodrum@Jaymes-MacBook-Air ~ % /Applications/Slicer.app/Contents/Extensions-31938/SlicerIGT/lib/Slicer-5.4/qt-loadable-modules/libqSlicerFiducialRegistrationWizardModule.dylib ; exit;
zsh: exec format error: /Applications/Sl
exec format error: /Applications/Slicer.app/Contents/Extensions-31938/SlicerIGT/lib/Slicer-5.4/qt-loadable-modules/libqSlicerFiducialRegistrationWizardModule.dylib
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### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [September 5, 2023, 2:11pm UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/4 "2023-09-05T14:11:33Z")
Maybe the extension package was corrupted while it was zipped, downloaded, or unzipped? Could you check if the files that you have on your computer are the same as those that you can download from the [Extensions Catalog](https://extensions.slicer.org/catalog/All/31938/macosx)?
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### Author:  [@Jayme\_Goodrum](https://discourse.slicer.org/u/Jayme_Goodrum)
#### Post date: [September 9, 2023, 7:45pm UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/5 "2023-09-09T19:45:18Z")
I did try this and still had the same error
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### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [September 9, 2023, 7:55pm UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/6 "2023-09-09T19:55:52Z")
There seems to be something wrong with the extension packages on macOS on Slicer-5.4. While we are working on a fix you can use Slicer-5.2.
@Sam_Horvath Are you aware of this issue? Is this something that you can have a look at or we need to wait for @jcfr? Do you know when he is going to be available?
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### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [September 12, 2023, 2:06pm UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/7 "2023-09-12T14:06:54Z")
Thanks for pointing this out, I will be looking into this today and follow up.
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### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [September 12, 2023, 10:11pm UTC](https://discourse.slicer.org/t/fiducial-registration-wizard-module-not-loading/31513/8 "2023-09-12T22:11:39Z")
The root cause has been identified and fixed ✅
Valid stable extensions are expected to be uploaded in the next 12 hours 🚀
For more details, see [New extensions can not work on Slicer 5.4.0 on MacOS - #4 by jcfr](https://discourse.slicer.org/t/new-extensions-can-not-work-on-slicer-5-4-0-on-macos/31535/4)