I got this prompt on Ubuntu:
How to do it?
Should I removed the current Kicad first then add the desired version of KiCad, or I could just install the latest edition when the elder edition hasn’t been removed:
sudo apt update && sudo apt upgrade
sudo add-apt-repository ppa:kicad/kicad-9.0-releases -y
sudo apt install kicad -y
see here for details:
it’s possible to make various KC versions coexist on one machine, but i suggest to stick with current version (9.0.2 at the time, 9.0.3 soon).
From the message i suspect the files have been opened with a nightly version, 9.99. If this is the case you only option is to install the most recent version of the nightly.
I see the date string 20230121 in your screenshot, and that’s two and a half years ago now, so you definitely don’t need the latest and greatest KiCad version for that project.
You do not need to uninstall an older version of KiCad before you install a new version. The installers are smart enough to work this out. However, your order of commands does not work. You have to update your package list after you’ve added the new repository, not before.
What is your Ubuntu version? I use 24.04 LTS and install kiCad 9.0.2 from a PPA
25.04 should also have a PPA.
The previous LTS 22.0.4 can run into trouble with Python and other dependencies
So I ran this command on Linux:
$ find play -name '*.kicad_sch' | xargs grep 'version 20230121' | less
Unfortunately picking one of the results to look at with a text editor didn’t show any KiCad version, but looking at the PDF of the schematic I left behind in the same directory showed that this schematic version corresponds to KiCad 7.0.9. So v7 and above can open this file.
version: Ubuntu 22.04.5 LTS
My current version is kicad 6.0, I want to remove it by:
sudo apt remove kicad
met with this error prompt:
Errors were encountered while processing:
usrmerge
E: Sub-process /usr/bin/dpkg returned an error code (1)
If possible, I would backup all data files on this PC and do a clean 24.0.4 LTS install.
Once dpkg is messed up the OS is in a mess
Have you tried repairing the package database:
sudo dpkg --configure -a
Then check if there are any broken dependecies:
sudo apt --fix-broken install
You could then try remove and reinstall usrmerge but I’d backup first. Sounds like there might be some big issues here.
The usrmerge is involved deep in the file system mount points, not directly with KiCad.
Before you try to repair, backup your data files, the PC can easily become unbootable.
I want to select this option, after I backup all the necessary data and start to install Ubuntu 24.04 by a ISO flash disk, I found it was not the same as usual, since I forgot when I have installed GUN GRUB, installing Ubuntu on GRUB is a new task, so I decided it would be better to draw in Kicad 6.0 as long as it could, for the file couldn’t be opened in 6.0, draw it again in 6.0 now hears not so hard a work.
Thanks you all for your suggestions.