# Cannot load RTSTRUCT file

**URL:** <https://discourse.slicer.org/t/cannot-load-rtstruct-file/35593>\
**Category:** Support\
**Tags:** slicerrt\
**Created:** [April 18, 2024, 11:35am UTC](https://discourse.slicer.org/t/cannot-load-rtstruct-file/35593 "2024-04-18T11:35:55Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![Freja](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/freja/32/69609_2.png) [@Freja](https://discourse.slicer.org/u/Freja)\
**Post date:** [April 19, 2024, 7:35am UTC](https://discourse.slicer.org/t/cannot-load-rtstruct-file/35593/3 "2024-04-19T07:35:19Z")

</div>

Thank you for your help! Opening the Python console made me realize I had problems with installation and that my problem was the same as in this thread: [Failure to load RTSTRUCT dicom file](https://discourse.slicer.org/t/failure-to-load-rtstruct-dicom-file/33504)

I have now also **solved it by installing Slicer 5.2.2** instead of Slicer 5.6.2.

There was alot of red massages when I opend the console so I will not paste all of them here, but for documentation, some of the error massages I got was:  
**When opening slicer after installation:**  
[Qt] Populating font family aliases took 190 ms. Replace uses of missing font family “.AppleSystemUIFont” with one that exists to avoid this cost.

**After restarting slicer after slicerRT installation:**  
Cannot load library /Applications/Slicer.app/Contents/Extensions-32448/SlicerRT/lib/Slicer-5.6/qt-loadable-modules/libqSlicerBeamsModule.dylib: (dlopen(/Applications/Slicer.app/Contents/Extensions-32448/SlicerRT/lib/Slicer-5.6/qt-loadable-modules/libqSlicerBeamsModule.dylib, 0x0085): Library not loaded: @rpath/libomp.dylib

---

_[View the full topic](https://discourse.slicer.org/t/cannot-load-rtstruct-file/35593)._