# Problem in render a volume on import
**URL:** https://discourse.slicer.org/t/problem-in-render-a-volume-on-import/34428
**Category:** Support
**Created:** [February 20, 2024, 4:03pm UTC](https://discourse.slicer.org/t/problem-in-render-a-volume-on-import/34428 "2024-02-20T16:03:01Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@calvinsuzuki](https://discourse.slicer.org/u/calvinsuzuki)
#### Post date: [February 20, 2024, 4:03pm UTC](https://discourse.slicer.org/t/problem-in-render-a-volume-on-import/34428/1 "2024-02-20T16:03:01Z")
Hey guys, I’ve been trying to do a very simple task on Slicer.
Just to display the rendered model on drag n drop import.
It rarely works, but in most cases I got the error:
Warning: In /work/Stable/Slicer-0/Modules/Loadable/VolumeRendering/Logic/vtkSlicerVolumeRenderingLogic.cxx, line 674
vtkSlicerVolumeRenderingLogic (0x7825480): CopyDisplayToVolumeRenderingDisplayNode: No display node to copy.
I used this on start of my module: [Script repository — 3D Slicer documentation](https://slicer.readthedocs.io/en/latest/developer_guide/script_repository.html#show-volume-rendering-automatically-when-a-volume-is-loaded)
[image deleted per request]
---
### Author:  [@lassoan](https://discourse.slicer.org/u/lassoan)
#### Post date: [February 20, 2024, 4:07pm UTC](https://discourse.slicer.org/t/problem-in-render-a-volume-on-import/34428/2 "2024-02-20T16:07:02Z")
There have been some recent improvements in volume rendering initilization. Please try with the latest Slicer Preview Release and let us know it the issue persists.
---
### Author:  [@calvinsuzuki](https://discourse.slicer.org/u/calvinsuzuki)
#### Post date: [February 23, 2024, 4:00pm UTC](https://discourse.slicer.org/t/problem-in-render-a-volume-on-import/34428/3 "2024-02-23T16:00:47Z")
Hello Andras! Thanks for reaching out!
I’m currently using the 5.2.2 version, I’ve managed to solve this issue by raising the time value of `qt.QTimer.singleShot` then dinamically checking if it was loaded and increasing the load time using `volRenLogic.SetRecommendedVolumeRenderingProperties(displayNode)`
```auto
def showVolumeRendering(self, volumeNode):
volRenLogic = slicer.modules.volumerendering.logic()
# Check if node exists, if not create a new one
displayNode = slicer.mrmlScene.GetFirstNodeByName('VolumeRendering')
if displayNode is None:
displayNode = volRenLogic.CreateVolumeRenderingDisplayNode()
slicer.mrmlScene.AddNode(displayNode)
# Set recommended volume rendering properties will return False if the
if not volRenLogic.SetRecommendedVolumeRenderingProperties(displayNode):
# If already using the largest loading time, print error message and return
if len(self.loading_time) == 1:
print('Failed to load volume! Please, drag it manually from Data.')
return
# If not, increase the loading time and try again
else:
self.loading_time.pop(0)
print('Failed to load volume! Increasing loading to ' + str(self.loading_time[0]) + 'ms.')
qt.QTimer.singleShot(self.loading_time[0], lambda: self.showVolumeRendering(volumeNode))
# ensure the display node is visible
displayNode.SetVisibility(True)
# add the volume to the display node
volumeNode.AddAndObserveDisplayNodeID(displayNode.GetID())
volRenLogic.UpdateDisplayNodeFromVolumeNode(displayNode, volumeNode)
# update the preset based on the volume scalar range
scalarRange = volumeNode.GetImageData().GetScalarRange()
if scalarRange[1]-scalarRange[0] < 1500:
# Small dynamic range, probably MRI
displayNode.GetVolumePropertyNode().Copy(volRenLogic.GetPresetByName("MR-Default"))
else:
# Larger dynamic range, probably CT
displayNode.GetVolumePropertyNode().Copy(volRenLogic.GetPresetByName("CT-Chest-Contrast-Enhanced"))
```