# Unable to open Scalar overlay

**URL:** <https://discourse.slicer.org/t/unable-to-open-scalar-overlay/12991>\
**Category:** Support\
**Created:** [August 14, 2020, 12:22am UTC](https://discourse.slicer.org/t/unable-to-open-scalar-overlay/12991 "2020-08-14T00:22:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Roman\_Kovtuh](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/roman_kovtuh/32/5210_2.png) [@Roman\_Kovtuh](https://discourse.slicer.org/u/Roman_Kovtuh)\
**Post date:** [August 14, 2020, 12:22am UTC](https://discourse.slicer.org/t/unable-to-open-scalar-overlay/12991/1 "2020-08-14T00:22:21Z")

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Operating system: Linux 4.15.0-112-generic #113-Ubuntu 18.04  
Slicer version: 4.10.2 r28257  
Expected behavior: Open file [1] with Overlay Plane tags set and show stored overlay.  
Actual behavior: When opening such file not in volume mode but as “Scalar Overlay” got an error: “virtual bool qSlicerScalarOverlayReader::load(const IOProperties&) failed: missing fileName or modelNodeId property”

File I try to open is from tests for pydicom Python library:  
[1] [https://github.com/pydicom/pydicom/blob/e8de9d31fc97e1162441adf4bd2742b82149ce18/pydicom/data/test\_files/MR-SIEMENS-DICOM-WithOverlays.dcm](https://github.com/pydicom/pydicom/blob/e8de9d31fc97e1162441adf4bd2742b82149ce18/pydicom/data/test_files/MR-SIEMENS-DICOM-WithOverlays.dcm)

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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:** [August 14, 2020, 12:24am UTC](https://discourse.slicer.org/t/unable-to-open-scalar-overlay/12991/2 "2020-08-14T00:24:33Z")

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A post was merged into an existing topic: [Open files with Overlay Plane tags set.](https://discourse.slicer.org/t/open-files-with-overlay-plane-tags-set/12990)

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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:** [August 14, 2020, 12:24am UTC](https://discourse.slicer.org/t/unable-to-open-scalar-overlay/12991/3 "2020-08-14T00:24:33Z")

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