Docker 4.12.0 closing PowerShell windows on lab start

[MrSpadala]

Hi guys

Problem

When launching, a Katharà laboratory, I observe powershell windows opening, hanging on for a few seconds, and then closing abruptly.

For a split second before closing, the window prints the following error message:

Steps to reproduce

On Windows, using Katharà 3.5.1 and docker 4.12.0. (as of now the latest versions for both docker and kathara).
The file lab.conf contains a single line pc[0]=A.

Other info

• In the background, the kathara laboratory is running, and one can connect successfully with kathara connect command.
• I've tried to use both the administrator's and the normal user's powershell, it didn't work.
• I wanted to try the option to change the terminal emulator, but at the moment such option exists only on Linux.

Fixes

For the moment, we have managed to fix this problem by installing the previous version of docker 4.11.1

[tcaiazzi]

Hi @MrSpadala,

Thanks for pointing out this.

We also noticed this problem today. It is related to this issue of docker-py: docker/docker-py#3045

We are working for releasing a fixed version for Windows as soon as possible (probably today).

As you say, for now the only possible fix is to downgrade Docker Desktop to version 4.11.1.

Sorry for the inconvenience,
Tommaso

[tcaiazzi]

We released the fixed version.

We replaced the old Windows installer inside release 3.5.1 with a new one: Kathara-windows-installer-x64-3.5.1-PATCHED.exe.

Feel free to re-open this issue if you have other problems.

Thanks,
Tommaso

[MrSpadala]

Works like a charm 🚀