# Problème using Voilà on my slicer JupiterKernel

**URL:** <https://discourse.slicer.org/t/probleme-using-voila-on-my-slicer-jupiterkernel/14188>\
**Category:** Development\
**Created:** [October 21, 2020, 3:09pm UTC](https://discourse.slicer.org/t/probleme-using-voila-on-my-slicer-jupiterkernel/14188 "2020-10-21T15:09:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Hugo](https://avatars.discourse-cdn.com/v4/letter/h/b38774/32.png) [@Hugo](https://discourse.slicer.org/u/Hugo)\
**Post date:** [October 21, 2020, 3:09pm UTC](https://discourse.slicer.org/t/probleme-using-voila-on-my-slicer-jupiterkernel/14188/1 "2020-10-21T15:09:24Z")

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Good afternoon,

What is Voilà? Voilà turns Jupyter notebooks into standalone web applications.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/1/c1643547fde0fc6adec87061c1e452ac59f764d2.png)

I tried opening my SliceletVideoEtienne .ipynb file that has code that run a Slicer app in the jupyterNotebook, using voilà but got this error : 404 not found ?  
I tried the exact same thing, opening a file .ipynb with simple python code print(“salut”) using voilà and it worked, only the result is being shown, the code is hide:  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/3/a3defb669f5106382fedf1217550b5abc34d6e76.png)

Have any of you encountered the same issue? Or, knows a better way?

Big thanks in advance,

Hugo