[ERROR - Linux] Stm32CubeMX2 - unable to find a random port on any host

[lcadet]

Hello,

I am currently facing a strange error when trying to create a project with any MCU/Board on Linux.

As shown on the screenshots, an error appears on dependencies download :

Unable to find a random port on any host GetPortError:

Unable to find a random port on any ...

And it spin indefinitly. 

This error seems to be related to Electron rather than the soft itself, but I can hardly follow the execution path of stm32CubeMX2 to know where I could maybe enforce another port.

Did anyone already encountered this bug ? 

Thanks.

[Oussama_TROUDI]

Hi @lcadet and welcome to ST Community,

Thank you for reporting this issue.

Could you please try launching STM32CubeMX2 from the command line in debug mode with the following command:

cube mx start --log-level debug

After that, please share the relevant log files with us so we can investigate further. You can find them under:

/home/<USER>/.local/share/stm32cube/logs

Press Ctrl + H to toggle hidden files and folders, such as .local.

Best regards,
Oussama.

[lcadet]

Hi oussama,

You can find attached my log file.
The important lines are:
2026-05-26T09:14:42.209Z [Debug] [ProjectSetupWidget#handleValidation] Creating application project from Board
2026-05-26T09:14:42.211Z [Debug] [ProjectCreationComponent#getProjectCreationForm] Render get project creation form
2026-05-26T09:14:42.328Z [Error] Uncaught Exception: GetPortError: Unable to find a random port on any host
2026-05-26T09:14:42.328Z [Error] GetPortError: Unable to find a random port on any host
at S (/scratch/softs/STM32CubeMX2/resources/stm32cubemx-application/1.0.1/dist/resources/app/lib/backend/main.js:2903:8475)
at async /scratch/softs/STM32CubeMX2/resources/stm32cubemx-application/1.0.1/dist/resources/app/lib/backend/main.js:356:222566
at async r (/scratch/softs/STM32CubeMX2/resources/stm32cubemx-application/1.0.1/dist/resources/app/lib/backend/main.js:431:285270)
at async b.dynamicValue (/scratch/softs/STM32CubeMX2/resources/stm32cubemx-application/1.0.1/dist/resources/app/lib/backend/main.js:431:285528)

Thanks for your interest.

Laurent.

[Oussama_TROUDI]

Thanks for sharing the logs @lcadet 

I'm currently working on this issue; I'll get back to you ASAP.

Internal ticket number: CDM0063073, (This is an internal tracking number and is not accessible or usable by customers).

Regards,
Oussama

[Oussama_TROUDI]

Hi @lcadet 
Could you please provide more details about the environment (OS, version of OS ...)?

Best regards,
Oussama.

[lcadet]

Hi,

I am working on Ubuntu 24.04.4 LTS.
I already have STM32CubeMX installed (6.17.0; /home/lcadet/STM32CubeMX). I also have STM32CubeMX2 installed.

>>> cube --version
cube wrapper version: 0.10.2
cube wrapper running on: x86_64-unknown-linux
cube wrapper installed at '/home/lcadet/.local/stm32cube/bin/cube'

PATH= /home/lcadet/.local/stm32cube/bin: ....

when calling STM32CubeMX2 from application serach (SUPER+{search}), it runs :
/scratch/softs/STM32CubeMX2/resources/stm32cubemx-application/1.0.1/dist/stm32cubemx2

ps -fp {PID} return:
UID PID PPID C STIME TTY TIME CMD
lcadet 98920 98468 5 16:41 ? 00:00:15 /proc/self/exe --type=renderer --enable-crash-reporter=1bdb2ea0-e207-4d14-b9db-9b3efbd939e3,no_channel --user-data-dir=/home/lcadet/.config/STM32CubeMX2 --app-path=/scratch/softs/STM32CubeMX2/resources/stm32cubemx-application/1.0.1/dist/resources/app --no-sandbox --no-zygote --no-sandbox --lang=en-US --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=4 --time-ticks-at-unix-epoch=-1780303482624865 --launch-time-ticks=21400680857 --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,9117161096884650414,15039438768759429813,262144 --enable-features=PdfUseShowSaveFilePicker --disable-features=ScreenAIOCREnabled,SpareRendererForSitePerProcess --variations-seed-version

Do you need more info ?

Laurent.

[Oussama_TROUDI]

Hello @lcadet 

Please try the following workaround by adding the host name to /etc/hosts.

1. Open a terminal.
2. Edit the file with root privileges:   sudo nano /etc/hosts
3. dd or update this line:  127.0.0.1 localhost
4. Save the file and exit.

Please let me know whether this works for you.

Regards
Oussama

[lcadet · Accepted solution]

Hello Oussama,

I have tried both removing and commenting this line (127.0.0.1 localhost), but it didn't change anything.

However, thanks to your suggestion about /etc/hosts and this issue nuxt issue 19068, I figured out that my $HOST variable was set to :
HOST=MyPrecious

Thus, it tried to find a port for MyPrecious, which is not a valid host !

Thus adding it to /etc/hosts with a given IP:

127.0.0.1 localhost
127.0.2.1 MyPrecious

Solved the problem !!! Thus, you should make sure that if $HOST is defined, it HAS TO BE GIVEN an IP in /etc/hosts.

Thus, my problem is solved.

I hope that it will help others !

Thank you Oussama for your time,

Laurent.

[Oussama_TROUDI]

Hello @lcadet 

Thank you for the update. I’m glad to hear that the issue is resolved.

Best regards,
Oussama