# GetDisplayNode returns 'NoneType' after I create manually a Node

**URL:** <https://discourse.slicer.org/t/getdisplaynode-returns-nonetype-after-i-create-manually-a-node/11863>\
**Category:** Development\
**Created:** [June 4, 2020, 4:40pm UTC](https://discourse.slicer.org/t/getdisplaynode-returns-nonetype-after-i-create-manually-a-node/11863 "2020-06-04T16:40:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![siaeleni](https://avatars.discourse-cdn.com/v4/letter/s/b4bc9f/32.png) [@siaeleni](https://discourse.slicer.org/u/siaeleni)\
**Post date:** [June 4, 2020, 4:40pm UTC](https://discourse.slicer.org/t/getdisplaynode-returns-nonetype-after-i-create-manually-a-node/11863/1 "2020-06-04T16:40:46Z")

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Hi All,

I create a qMRMLNodeComboBox using following code:

> ```
> self.outputSelector = slicer.qMRMLNodeComboBox()
> self.outputSelector.nodeTypes = ["vtkMRMLModelNode"]
> self.outputSelector.selectNodeUponCreation = True
> self.outputSelector.addEnabled = True
> self.outputSelector.removeEnabled = True
> self.outputSelector.noneEnabled = True
> self.outputSelector.renameEnabled = True
> self.outputSelector.showHidden = False
> self.outputSelector.showChildNodeTypes = False
> self.outputSelector.setMRMLScene(slicer.mrmlScene)
> 
> ```

After creating manually a new Model from UI, I try to make the model visible by using:

> node = slicer.util.getNode(‘Model’)  
> d = node.GetDisplayNode()

but type(d) = NoneType

I am not sure how can I make it visible.

Thanks

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<div class="post-metadata">

**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:** [June 4, 2020, 5:02pm UTC](https://discourse.slicer.org/t/getdisplaynode-returns-nonetype-after-i-create-manually-a-node/11863/2 "2020-06-04T17:02:53Z")

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After you add a data node to the scene and set its content, you need to add display node to show it in views. The simplest is to call `CreateDefaultDisplayNodes()`.