# vtkPointInterpolator doesn't work, if the scalar array of the source data does not have a name

**URL:** https://discourse.vtk.org/t/vtkpointinterpolator-doesnt-work-if-the-scalar-array-of-the-source-data-does-not-have-a-name/2979
**Category:** Support
**Created:** [April 8, 2020, 5:59am UTC](https://discourse.vtk.org/t/vtkpointinterpolator-doesnt-work-if-the-scalar-array-of-the-source-data-does-not-have-a-name/2979 "2020-04-08T05:59:22Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Yue\_JIN](https://discourse.vtk.org/user_avatar/discourse.vtk.org/yue_jin/32/1228_2.png) [@Yue\_JIN](https://discourse.vtk.org/u/Yue_JIN)
#### Post date: [April 8, 2020, 5:59am UTC](https://discourse.vtk.org/t/vtkpointinterpolator-doesnt-work-if-the-scalar-array-of-the-source-data-does-not-have-a-name/2979/1 "2020-04-08T05:59:22Z")

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It may be a bug? This problem is not stated in document.

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### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [April 8, 2020, 6:12am UTC](https://discourse.vtk.org/t/vtkpointinterpolator-doesnt-work-if-the-scalar-array-of-the-source-data-does-not-have-a-name/2979/2 "2020-04-08T06:12:53Z")

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Not a bug, as array should always be named afaik.

This was in the documentation at some point but was removed.

@utkarshayachit