# Unhandled Rejection (TypeError): Cannot read property 'pixelRepresentation' of undefined

**URL:** <https://discourse.vtk.org/t/unhandled-rejection-typeerror-cannot-read-property-pixelrepresentation-of-undefined/5055>\
**Category:** Development\
**Created:** [January 25, 2021, 7:28pm UTC](https://discourse.vtk.org/t/unhandled-rejection-typeerror-cannot-read-property-pixelrepresentation-of-undefined/5055 "2021-01-25T19:28:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MarkoNikovic](https://discourse.vtk.org/user_avatar/discourse.vtk.org/markonikovic/32/2931_2.png) [@MarkoNikovic](https://discourse.vtk.org/u/MarkoNikovic)\
**Post date:** [January 25, 2021, 7:28pm UTC](https://discourse.vtk.org/t/unhandled-rejection-typeerror-cannot-read-property-pixelrepresentation-of-undefined/5055/1 "2021-01-25T19:28:01Z")

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Hello Everyone, How are you?  
I am using react-vtkjs-viewport module in our project (React Rescripts)  
I set initialize setting vtkRules in rescript.js for VTK.

 ![Screenshot_1](https://discourse.vtk.org/uploads/default/original/2X/2/22a6344c9eff3e4ae77c2b3e176482a1483127d7.png)  
Now I have node mudule representation error  
I wish anyone help me asap.  
Thank you for your time and your reply