# Nbconvert 6.0.7 yields "ValueError" for all --to values other than "notebook"

**URL:** <https://discourse.jupyter.org/t/nbconvert-6-0-7-yields-valueerror-for-all-to-values-other-than-notebook/8166>\
**Category:** Notebook\
**Created:** [March 2, 2021, 1:09pm UTC](https://discourse.jupyter.org/t/nbconvert-6-0-7-yields-valueerror-for-all-to-values-other-than-notebook/8166 "2021-03-02T13:09:37Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![txoof](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/txoof/32/3165_2.png) [@txoof](https://discourse.jupyter.org/u/txoof)\
**Post date:** [March 2, 2021, 1:09pm UTC](https://discourse.jupyter.org/t/nbconvert-6-0-7-yields-valueerror-for-all-to-values-other-than-notebook/8166/1 "2021-03-02T13:09:37Z")

</div>

I’ve just installed Python 3.9 on a Big Sur Apple Silicon M1 using Homebrew. Everything appears to be working as expected except for nbconvert.

I installed jupyter using pip3 as usual:

```auto
$ pip3 install jupyter

```

Running `$ jupyter-nbconvert --to markdown my_notebook.ipynb` yields:

```auto
ValueError: No template sub-directory with name 'markdown' found in the following paths:
	/Users/aciuffo/Library/Jupyter
	/opt/homebrew/Cellar/python@3.9/3.9.2_1/Frameworks/Python.framework/Versions/3.9/share/jupyter
	/usr/local/share/jupyter
	/usr/share/jupyter

```

The only command that appears to function currently is:

```auto
$ jupyter nbconvert --to notebook my_project.ipynb       
[NbConvertApp] Converting notebook my_project.ipynb to notebook
[NbConvertApp] Writing 7598 bytes to my_project.nbconvert.ipynb

```

This leads me to believe that some part of nbconvert is missing, but I’m really at a loss.

My `~/.jupyter` directory is completely empty at this point (no dot files even).

This has worked as expected with previous installs of nbconvert v6.

Any ideas? Is this a bug, or am I doing something very dumb?

---

<div class="post-metadata">

**Author:** ![txoof](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/txoof/32/3165_2.png) [@txoof](https://discourse.jupyter.org/u/txoof)\
**Post date:** [March 2, 2021, 1:32pm UTC](https://discourse.jupyter.org/t/nbconvert-6-0-7-yields-valueerror-for-all-to-values-other-than-notebook/8166/2 "2021-03-02T13:32:41Z")

</div>

After digging through the Github issues, I eventually found this [closed thread](https://github.com/jupyter/nbconvert/issues/1437). Apparently in some circumstances the environment can get børked and this leads to path issues.

I resolved this by completely removing the homebrew python environment, and started over using pyenv to build a new python 3.9 environment.

Here are the exact steps for others that might run into this:

- `brew uninstall python`
- `brew install python`
- `brew install pyenv`
- `pyenv install 3.9.1`
- `pyenv global 3.9.1`
- open a fresh terminal to ensure your shims are all properly active
  - test with: `which python3` this should yield: `/Users/foobar/.pyenv/shims/python` if your pyenv version is active

- `pip3 install jupyter`

---

<div class="post-metadata">

**Author:** ![ChristianWia](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/christianwia/32/4602_2.png) [@ChristianWia](https://discourse.jupyter.org/u/ChristianWia)\
**Post date:** [June 13, 2021, 8:51am UTC](https://discourse.jupyter.org/t/nbconvert-6-0-7-yields-valueerror-for-all-to-values-other-than-notebook/8166/3 "2021-06-13T08:51:37Z")

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I have also fighted a lot because simple download of jupyter notebook was even impossible with last versions as it used to work before. I am aligned on latest versions of Python and jupyter and it is not advisable for me to downgrade modules to reestablish compatibility specially when my environnement is heavy with a lot of modules interconnected. I use pip and Win 7 and the web interface.

I see that my **jupyter templates** were installed under _E:\program\Python\Python38\share\jupyter\nbconvert_. As the jupyter “download as” shows the directories it searches in (look at the server error report), I have there 3 path (= 3 solutions) from where I chose to modify my C:\ProgramData\jupyter directory

> C:\ProgramData\jupyter\>dir  
> Répertoire de C:\ProgramData\jupyter
> 
> 13/06/2021 10:13 .  
> 13/06/2021 10:13 …  
> 27/04/2021 18:00 kernels  
> 26/04/2021 17:44 nbconvert

transforming the nbconvert sub-directory into a link to using dos command mklink after renaming the existing into “nbconvert~” becoming obsolete :

> C:\ProgramData\jupyter\>mklink /J nbconvert E:\program\Python\Python38\share\jupyter\nbconvert  
> Jonction créée pour nbconvert \<\<===\>\> E:\program\Python\Python38\share\jupyter\nbconvert
> 
> C:\ProgramData\jupyter\>dir
> 
> Répertoire de C:\ProgramData\jupyter
> 
> 13/06/2021 10:15 .  
> 13/06/2021 10:15 …  
> 27/04/2021 18:00 kernels  
> 13/06/2021 10:15 nbconvert [E:\program\Python\Python38\share\jupyter\nbconvert]  
> 26/04/2021 17:44 nbconvert~

Convertion is now operational.