# Slicer not loading a radiotherapy plan and dataset

**URL:** <https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453>\
**Category:** Support\
**Tags:** radiotherapy\
**Created:** [July 10, 2018, 9:35pm UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453 "2018-07-10T21:35:37Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Lowey](https://avatars.discourse-cdn.com/v4/letter/l/e36b37/32.png) [@Lowey](https://discourse.slicer.org/u/Lowey)\
**Post date:** [July 10, 2018, 9:35pm UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453/1 "2018-07-10T21:35:37Z")

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Operating system: Windows 7

Slicer version: 4.8.1

Expected behavior: To be able to examine and load a radiotherapy dataset without errors

Actual behavior: I receive the following errors when trying to ‘examine’ my data:

![Error1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/6/3/63e565ad20f673734f0c9023d1064ca73fd1f2f7.png)

and then when I ‘load’ the data I get the following error,

 ![Error3](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/b/9/b98a42581550fc6974c584e903e8537bf528e960.png)

Any help would be greatly appreciated. I have run this dataset on my personal computer with no issues. So, I expect there may be some issue with the hospital network on the computer I am trying to run this on

Many thanks!

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 11, 2018, 12:09am UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453/2 "2018-07-11T00:09:06Z")

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Check out tips on [DICOM FAQ page](https://www.slicer.org/wiki/Documentation/Nightly/FAQ/DICOM#When_I_click_on_.22Load_selection_to_slicer.22_I_get_an_error_message_.22Could_not_load_..._as_a_scalar_volume.22). If you cannot resolve the issue then the best would be to share a phantom or anonymized dataset with us.

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**Author:** ![Lowey](https://avatars.discourse-cdn.com/v4/letter/l/e36b37/32.png) [@Lowey](https://discourse.slicer.org/u/Lowey)\
**Post date:** [July 11, 2018, 1:18am UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453/3 "2018-07-11T01:18:50Z")

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My DICOM dataset is not the issue I’m fairly sure. This is because I have Slicer installed on a personal laptop and can load the exact same dataset with no issues.

However on my hospital computer I run into the issues posted above. I have attempted the tips on the DICOM FAQ page with no success.

I have attached the error messages I receive in the python console when simply starting Slicer,

 ![Error4](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/0/f0e076d6209d9cc620b3ba7b28daf2363544de08.png)

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 11, 2018, 1:31am UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453/4 "2018-07-11T01:31:00Z")

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It seems that SlicerRT extension installation is corrupted. Please try to uninstall SlicerRT and reinstall.

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**Author:** ![Lowey](https://avatars.discourse-cdn.com/v4/letter/l/e36b37/32.png) [@Lowey](https://discourse.slicer.org/u/Lowey)\
**Post date:** [July 11, 2018, 1:38am UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453/5 "2018-07-11T01:38:00Z")

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Hi Andras,

Thanks for your speedy reply. I just attempted an uninstall and reinstall of Slicer 3.8.1 and then an install of SlicerRT but I still get the same error messages upon starting Slicer,

 ![Error5](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/2/2/22380013e274399d4ed721afc67de9e610182475.png)

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**Author:** ![Lowey](https://avatars.discourse-cdn.com/v4/letter/l/e36b37/32.png) [@Lowey](https://discourse.slicer.org/u/Lowey)\
**Post date:** [July 11, 2018, 2:04am UTC](https://discourse.slicer.org/t/slicer-not-loading-a-radiotherapy-plan-and-dataset/3453/6 "2018-07-11T02:04:59Z")

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Hi Andras,

OK I have fixed my problem, although I have no idea why it was an issue. For some reason Slicer wasn’t reading the SlicerRT extension’s qt-loadable-modules in the ‘Additional module path’

So, I copied those files and placed them in the ‘Slicer/lib/Slicer-4.8/qt-loadable-modules’ path

And now it seems to work fine

Thank you, as always!!