# vtkWin32RenderWindowInteractor (00000212DF4DB820): No renderer defined!

**URL:** https://discourse.vtk.org/t/vtkwin32renderwindowinteractor-00000212df4db820-no-renderer-defined/4124
**Category:** Support
**Created:** [September 2, 2020, 8:41am UTC](https://discourse.vtk.org/t/vtkwin32renderwindowinteractor-00000212df4db820-no-renderer-defined/4124 "2020-09-02T08:41:52Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![giri\_lakshman](https://discourse.vtk.org/user_avatar/discourse.vtk.org/giri_lakshman/32/2270_2.png) [@giri\_lakshman](https://discourse.vtk.org/u/giri_lakshman)
#### Post date: [September 2, 2020, 8:41am UTC](https://discourse.vtk.org/t/vtkwin32renderwindowinteractor-00000212df4db820-no-renderer-defined/4124/1 "2020-09-02T08:41:52Z")

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Hi,  
I am working on a reading dicom images using Qt framework and VTK.  
I followed the below example .

> <https://github.com/fblupi/read-dicom-series-vtk-qt/blob/master/ReadDICOMSeriesQt.cxx>

When i open a dicom image file from a directory, I was not able to view the image and I get the following error.

ERROR: In D:\VTK\VTK-9.0.1\Rendering\UI\vtkWin32RenderWindowInteractor.cxx, line 178  
vtkWin32RenderWindowInteractor (00000212DF4DB820): No renderer defined!

How can i resolve this?

Thanks in advance.

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<div class="post-metadata">

### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [September 4, 2020, 12:21am UTC](https://discourse.vtk.org/t/vtkwin32renderwindowinteractor-00000212df4db820-no-renderer-defined/4124/2 "2020-09-04T00:21:11Z")

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Instead of starting from scratch, I would recommend to build upon/customize/extend any of the free, open-source VTK+Qt based medical image viewers, such as 3D Slicer or MITK.

If you want to implement something small and simple then users expect to get a web application that runs in their browser, on their tablets and phones.  
If you need to implement something more sophisticated then a desktop application makes sense, but you cannot afford to start one from scratch, because the development would just requite too much time and money.