# No such channel: 'control'

**URL:** <https://discourse.jupyter.org/t/no-such-channel-control/10177>\
**Category:** JupyterLab\
**Created:** [July 30, 2021, 6:31pm UTC](https://discourse.jupyter.org/t/no-such-channel-control/10177 "2021-07-30T18:31:58Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![matt](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/matt/32/4710_2.png) [@matt](https://discourse.jupyter.org/u/matt)\
**Post date:** [July 30, 2021, 6:31pm UTC](https://discourse.jupyter.org/t/no-such-channel-control/10177/1 "2021-07-30T18:31:58Z")

</div>

I am getting this error on my jupyter logs.

`[W 2021-07-30 18:22:03.947 ServerApp] No such channel: 'control'`

I believe it is preventing me from loading the ipykernel debugger despite have lab 3.1.1 and ipykernel 6.0.3. See [Missing Debugger Option](https://discourse.jupyter.org/t/missing-debugger-option/9851)

Can anyone advise as to why I am seeing the missing ‘control’ channel error?

My full package list is below. Note I am not running in a conda or any virtual environment. I am running in a docker image that I built from scratch using the jupyter docker stacks as a model (needed to remove package bloat for my deployment)

```auto
Package Version Location
---------------------- ------------ ---------------------------------------
anyio 3.3.0
appmode 0.8.0
argon2-cffi 20.1.0
async-generator 1.10
attrs 21.2.0
Babel 2.9.1
backcall 0.2.0
beautifulsoup4 4.9.3
bleach 3.3.1
certifi 2021.5.30
cffi 1.14.6
charset-normalizer 2.0.3
colorama 0.4.4
cron-descriptor 1.2.24
cryptography 3.4.7
cycler 0.10.0
debugpy 1.4.1
decorator 5.0.9
defusedxml 0.7.1
Deprecated 1.2.12
entrypoints 0.3
gitdb 4.0.7
GitPython 3.1.18
idna 3.2
ipykernel 6.0.3
ipython 7.25.0
ipython-genutils 0.2.0
ipyvue 1.5.0
ipyvuetify 1.8.0
ipywidgets 7.6.3
jedi 0.18.0
Jinja2 3.0.1
json5 0.9.6
jsonschema 3.2.0
jupyter-client 6.1.12
jupyter-core 4.7.1
jupyter-server 1.10.1
jupyter-server-mathjax 0.2.3
jupyterlab 3.1.1
jupyterlab-git 0.30.1
jupyterlab-pygments 0.1.2
jupyterlab-server 2.6.1
jupyterlab-widgets 1.0.0
kiwisolver 1.3.1
Mako 1.1.4
Markdown 3.3.4
MarkupSafe 2.0.1
matplotlib 3.4.2
matplotlib-inline 0.1.2
mistune 0.8.4
nbclassic 0.3.1
nbclient 0.5.3
nbconvert 6.1.0
nbdime 3.1.0
nbformat 5.1.3
nest-asyncio 1.5.1
notebook 6.4.0
numpy 1.21.0
p2j 1.3.2
packaging 21.0
pandas 1.3.0
pandocfilters 1.4.3
parsedatetime 2.6
parso 0.8.2
pexpect 4.8.0
pickleshare 0.7.5
Pillow 8.3.1
pip 21.1.2
plotly 5.1.0
prometheus-client 0.11.0
prompt-toolkit 3.0.19
ptyprocess 0.7.0
pycparser 2.20
Pygments 2.9.0
pyOpenSSL 20.0.1
pyparsing 2.4.7
pyrsistent 0.18.0
python-dateutil 2.8.2
pytz 2021.1
pyzmq 22.1.0
recurrent 0.4.0
requests 2.26.0
requests-unixsocket 0.2.0
scipy 1.7.0
Send2Trash 1.7.1
setuptools 57.4.0
six 1.16.0
smmap 4.0.0
sniffio 1.2.0
soupsieve 2.2.1
tenacity 8.0.1
terminado 0.10.1
testpath 0.5.0
tornado 6.1
traitlets 5.0.5
tzlocal 2.1
urllib3 1.26.6
wcwidth 0.2.5
webencodings 0.5.1
websocket-client 1.1.0
wheel 0.36.2
widgetsnbextension 3.5.1
wrapt 1.12.1

```

Thanks!