Command line: power shell : -- cl invalid argument

Hello everyone. I am trying to export my projects from a 'master' project which is linked with 'children projects'. I wrote the instructions in a *.bat file and specified a environment variable (path of robohelp)
Here is an example of my first line of code:

"C:\Program Files\Adobe\RoboHelp 2020\RoboHelp.exe" --cl "D:\OLH\05_Tests_RH_2020\input\Master_project.rhpj" -o "FORCE" -p "D:\OLH\05_Tests_RH_2020\compilations\command_line" -l D:\OLH\05_Tests_RH_2020\log_tests_compilations\master.html

The other lines allow to compile the child projects. The result is correct and everything seems to work well (either the files are correctly exported).

I still get error messages that look like this:

(node:23060) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.

I don't really understand why because i thought this problems where solved with the build version i have.

So I tried to compile my projects with PowerShell but it seems that the --cl argument is not recognized.

Being a beginner, I would like to have your opinion on this line:

Set-Location 'C:\Program Files\Adobe RoboHelp 2020\RoboHelp.exe' --cl 'D:\OLH\05_Tests_RH_2020\input\Master_project. rhpj' --output 'FORCE' --path 'D:\OLH\05_Tests_RH_2020\compilations\command_line' --log 'D:\OLH\05_Tests_RH_2020\log_tests_compilations\Master_project.html'

I replaced the -o and -p argument with --output and --path because i had errors messages during the script execution.

I used PowerShell with RH 2017 and i had no problem.

I have read the online help and advice given in this page:
https://www.grainge.org/pages/authoring/rh_tour/rh2020/outputs/command_line.htm 

But it doesn't work.

So, here are my questions :
- why my *.bat returns errors messages even if i'm up-to-date (RH 2020.8.34)

- where is the problem with my PowerShell script.

As cmd seems to be deprecated in the future, I would prefer my PowerShell script to work 😉

To complete, i'm a Window 10 user.

Thank you very much for the answers.