Raise the exception when LoadImage has a reader specified but it is not installed  #7437

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1. KumoLiu

   added

   enhancementNew feature or requestNew feature or request

   good first issueGood for newcomersGood for newcomers

   Contribution wanted

   on Feb 5, 2024
2. Bhavay-2001 commented on Feb 6, 2024

   

   Bhavay-2001

   on Feb 6, 2024

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   Hi @KumoLiu, I would like to work on this issue instead. Can you please guide me through this?
3. MartinKalema

   added a commit that references this issue on Feb 10, 2024

   Project-MONAI#7437 issue: Raise ModuleNotFoundError for missing depen…

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   ff88374
5. KumoLiu commented on Mar 8, 2024

   

   KumoLiu

   on Mar 8, 2024

   Contributor

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   Hi @girishsenthil,, free feel to create a PR, here is the contribution guide.
   https://github.com/Project-MONAI/MONAI/blob/dev/CONTRIBUTING.md
   Thanks.
7. KumoLiu commented on Mar 23, 2024

   

   KumoLiu

   on Mar 23, 2024

   Contributor

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   Hi @girishsenthil, Thanks for all the hard work you've put in! I would like to recommend that you submit a PR in this repository, rather than your own. Please follow these steps:
   https://github.com/Project-MONAI/MONAI/blob/dev/CONTRIBUTING.md#submitting-pull-requests

   Thanks!
8. its-serah

   added a commit that references this issue on Jul 29, 2025

   Fix LoadImage to raise OptionalImportError when specified reader is n…

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   a741d0b
9. abishop1990

   added 2 commits that reference this issue on Mar 7, 2026

   fix: raise exception when LoadImage reader is specified but not insta…

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   This issue will close once commit 0940296 is merged into the 'dev' branch.

   0940296

   fix: update test_load_image to skip explicit readers in min-dep envir…

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   This issue will close once commit 7712ff8 is merged into the 'dev' branch.

   7712ff8
10. haoyu-haoyu

    added 4 commits that reference this issue on Mar 11, 2026

    Raise exception when user-specified reader package is not installed

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    This issue will close once commit 1b6730f is merged into the 'dev' branch.

    1b6730f

    Raise exception when user-specified reader package is not installed

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    This issue will close once commit 255db19 is merged into the 'dev' branch.

    255db19

    Raise exception when user-specified reader package is not installed

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    This issue will close once commit 1e6dd49 is merged into the 'dev' branch.

    1e6dd49

    Raise exception when user-specified reader package is not installed

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    This issue will close once commit 8024900 is merged into the 'dev' branch.

    8024900
11. ericspod commented on Mar 29, 2026

    

    ericspod

    on Mar 29, 2026

    Member

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    Hi @its-serah, @abishop1990, and @haoyu-haoyu thanks all for addressing this issue. Sorry for the delays in getting to reviewing these, we've had a lot of other things blocking other progress as well. I think the three proposals all have their merits that we should combine together as the solutions are all quite similar. @its-serah's implementation was farthest along though we didn't figure out all the CI issues so didn't merge, @abishop1990 your solution has more user-friendly wording, @haoyu-haoyu the install hints are useful as well.

    I'd propose that @its-serah finish #8522 to fix the formatting complaint and the DCO issue. With that done either we merge PRs from @abishop1990 (#8768) and @haoyu-haoyu (#8771) after updates or you two collaborate on @its-serah's fork (if you are ok with that @its-serah). I want to get all your changes in and give you all contribution credit so please bear with us, thanks!
12. KamayaniR

    added a commit that references this issue on Apr 12, 2026

    fix(LoadImage): raise OptionalImportError when user-specified reader …

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    This issue will close once commit b1ce780 is merged into the 'dev' branch.

    b1ce780
13. vikasreddy11 commented on May 13, 2026

    

    vikasreddy11

    on May 13, 2026

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    Hi, I'd like to work on this.
14. ericspod

    assigned

    vikashg

    on Aug 7, 2026
15. vikashg

    added a commit that references this issue on Aug 14, 2026

    Raise OptionalImportError for unavailable explicit image readers (#9006)

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    This issue will close once commit 1a165c9 is merged into the 'dev' branch.

    1a165c9
16. vikashg

    closed this as completedin #9006on Aug 14, 2026
17. Talhax55z commented on Oct 1, 2026

    

    Talhax55z

    on Oct 1, 2026

    Contributor

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    I agree #8989 / #9142 is the better direction. I'm happy to close #8795 in favour of those. Once the pkg_name mechanism is merged I can rebase #8796 onto it for the reader side, or close it too, whichever you prefer.