# How to debug dead IJulia kernels (julia 1.4.1)

**URL:** https://discourse.julialang.org/t/how-to-debug-dead-ijulia-kernels-julia-1-4-1/39063
**Category:** General Usage
**Tags:** ijulia
**Created:** [May 8, 2020, 7:14am UTC](https://discourse.julialang.org/t/how-to-debug-dead-ijulia-kernels-julia-1-4-1/39063 "2020-05-08T07:14:45Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Alexander-Barth](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/alexander-barth/32/3692_2.png) [@Alexander-Barth](https://discourse.julialang.org/u/Alexander-Barth)
#### Post date: [May 8, 2020, 7:14am UTC](https://discourse.julialang.org/t/how-to-debug-dead-ijulia-kernels-julia-1-4-1/39063/1 "2020-05-08T07:14:45Z")

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I am trying to help two students whom I asked to install julia 1.4.1 and IJulia (one on Windows, and one on Kubuntu 20.04). Both have the issue that the IJulia kernel is crashing directly.

Here is a thread of the discussion:  
[https://github.com/Alexander-Barth/HF-radar-assim-exercise/issues/1](https://github.com/Alexander-Barth/HF-radar-assim-exercise/issues/1)

I have asked them to enable `IJULIA_DEBUG`:

```julia
ENV["IJULIA_DEBUG"]=true
using Pkg
Pkg.build("IJulia",verbose=true)

```

But so far we were not able to see any useful error message why the kernel is crashing.

Does somebody have an idea how to debug these issues?

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### Author: ![Alexander-Barth](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/alexander-barth/32/3692_2.png) [@Alexander-Barth](https://discourse.julialang.org/u/Alexander-Barth)
#### Post date: [May 8, 2020, 8:59am UTC](https://discourse.julialang.org/t/how-to-debug-dead-ijulia-kernels-julia-1-4-1/39063/2 "2020-05-08T08:59:53Z")

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I am wondering if `IJulia.set_verbose` works as mentioned in the docs:

> <https://github.com/JuliaLang/IJulia.jl/blob/master/src/IJulia.jl#L54>

I do not see much information in the julia terminal after running `notebook()` after ensuring that verbose is true. Wouldn’t it be useful to echo all jupyter message in the Julia terminal if verbose/debug is true?

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### Author: ![cet](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cet/32/18549_2.png) [@cet](https://discourse.julialang.org/u/cet)
#### Post date: [October 22, 2020, 1:59pm UTC](https://discourse.julialang.org/t/how-to-debug-dead-ijulia-kernels-julia-1-4-1/39063/3 "2020-10-22T13:59:00Z")

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Following this : https://discourse.julialang.org/t/using-ijulia-with-existing-jupyter-installation-outwith-anaconda/38832/11?u=cet  
Maybe…

CET.