# Cannot read properties of undefined (reading '0') when switching to Oblique View

**URL:** https://discourse.vtk.org/t/cannot-read-properties-of-undefined-reading-0-when-switching-to-oblique-view/16115
**Category:** VolView
**Created:** [October 28, 2025, 8:01pm UTC](https://discourse.vtk.org/t/cannot-read-properties-of-undefined-reading-0-when-switching-to-oblique-view/16115 "2025-10-28T20:01:23Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Pranathi\_Induri](https://discourse.vtk.org/user_avatar/discourse.vtk.org/pranathi_induri/32/10177_2.png) [@Pranathi\_Induri](https://discourse.vtk.org/u/Pranathi_Induri)
#### Post date: [October 28, 2025, 8:01pm UTC](https://discourse.vtk.org/t/cannot-read-properties-of-undefined-reading-0-when-switching-to-oblique-view/16115/1 "2025-10-28T20:01:23Z")

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When I load a DICOM CT dataset and try to switch to the “Oblique View” layout, VolView throws a TypeError: Cannot read properties of undefined (reading ‘0’) error. The standard views (Quad View, Axial Primary, etc.) work fine, but the oblique view consistently fails. What would be the workaround for this error?

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### Author: ![PaulHax](https://discourse.vtk.org/user_avatar/discourse.vtk.org/paulhax/32/2748_2.png) [@PaulHax](https://discourse.vtk.org/u/PaulHax)
#### Post date: [November 3, 2025, 1:11pm UTC](https://discourse.vtk.org/t/cannot-read-properties-of-undefined-reading-0-when-switching-to-oblique-view/16115/2 "2025-11-03T13:11:44Z")

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We fixed the Oblique View error in this PR: [Multi-series viewing by floryst · Pull Request #774 · Kitware/VolView · GitHub](https://github.com/Kitware/VolView/pull/774)

The fix is depolyed on the volview-dev site that tracks the main branch: [https://volview-dev.kitware.app/](https://volview-dev.kitware.app/)