# RegistrationQA extension not available in slicer v. 5.6.1
**URL:** https://discourse.slicer.org/t/registrationqa-extension-not-available-in-slicer-v-5-6-1/35397
**Category:** Support
**Tags:** registration
**Created:** [April 9, 2024, 3:48pm UTC](https://discourse.slicer.org/t/registrationqa-extension-not-available-in-slicer-v-5-6-1/35397 "2024-04-09T15:48:56Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@labixin](https://discourse.slicer.org/u/labixin)
#### Post date: [April 9, 2024, 3:48pm UTC](https://discourse.slicer.org/t/registrationqa-extension-not-available-in-slicer-v-5-6-1/35397/1 "2024-04-09T15:48:56Z")
Hello everyone,
Is RegistrationQA extension not available in “Extension manager” in the newest stable released version 5.6.1? Is it still under debugging? I remember that it existed in previous version 5.2.2.
If not available in “Extension manager”, how could I install this entension?
Thank you in advance. Your help is highly appreciated.
Sincerely,
Crayon
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### Author:  [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)
#### Post date: [April 9, 2024, 8:24pm UTC](https://discourse.slicer.org/t/registrationqa-extension-not-available-in-slicer-v-5-6-1/35397/2 "2024-04-09T20:24:44Z")
>
>
> Annotations module, which provides \`vtkMRMLAnnotationROI\` and \`vtkMRMLAnnotation…Ruler\` nodes have been deprecated since April 2021 and will be removed in Slicer-5.4 stable version early next year.
> Since some modules in this extension use annotation nodes, these modules need to be updated to use markups nodes before the end of this year.
>
> \[This section\](https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/MigrationGuide/Slicer#Slicer\_5.3%3A\_Removed\_Annotation\_module) of the migration guide should help with implementing the changes and any questions can be asked at the \[Remove Annotations module topic in the Slicer forum\](https://discourse.slicer.org/t/remove-annotations-module/25271).
>
> Impacted modules:
> RegistrationQA\\Logic\\vtkSlicerRegistrationQALogic.cxx
> RegistrationQA\\SubjectHierarchyPlugins\\qSlicerSubjectHierarchyRegistrationQAPlugin.cxx
It appears the original developer created the code in the scope of their PhD and since then is unable to maintain the code to work with recent Slicer versions. @lassoan Did that developer ever give you admin access to that repo?