# IJulia Syntax Highlighting

**URL:** <https://discourse.julialang.org/t/ijulia-syntax-highlighting/3455>\
**Category:** General Usage\
**Created:** [May 1, 2017, 10:44am UTC](https://discourse.julialang.org/t/ijulia-syntax-highlighting/3455 "2017-05-01T10:44:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cortner](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cortner/32/204_2.png) [@cortner](https://discourse.julialang.org/u/cortner)\
**Post date:** [May 1, 2017, 10:44am UTC](https://discourse.julialang.org/t/ijulia-syntax-highlighting/3455/1 "2017-05-01T10:44:17Z")

</div>

It happens regularly that I open a notebook and syntax highlighting is broken. Next day it might work again - or not. Sometimes another notebooks started from the same server front page will work fine. I believe this is related to the following warning message:

```julia
[W 11:40:40.442 NotebookApp] 404 GET /components/codemirror/mode/julia/julia.js?v=20170501113954 (::1) 1.30ms referer=http://localhost:8888/notebooks/Silicon-Dipole.ipynb

```

Does anybody have an idea what causes this, and how to prevent it?