Synaptic opens an error window on start saying: E: The value 'experimental' is invalid for APT::Default-Release as such a release is not available in the sources E: _cache->open() failed, please report. by pressing the close button the program exits.
I solved by 1) re-enabling the experimental repos by editing the sources.list 2) apt-get update the problem was that I had selected "Prefer distribution from: experimental" but then I had disabled the experimental repos. RG
Thanks for your bugreport and sorry for my slow reply. It appears that apt got stricter about the default release. Did you ever set up the apt pinning manually? Or did you use the internal synaptic preference for setting the default release? Thanks, Michael
Hi, I had used the internal synaptic preference for setting the default release. Roberto release is not available in the sources FreeDes lib libra managing De library lib libr internatio GTK+ for a app library (c all me
Good morning My problem is that I get this message when I start synaptic: E: The value "buster" is not valid for APT::Default-Release as that distribution is not available in the sources. E: _cache->open() failed, please report. I have checked /etc/apt/ and no "buster" appears in any file. My distribution is bullseye to which I migrated a few days ago. Regards Thanks Pd is an automatic translation Translated with www.DeepL.com/Translator (free version) Sent from [ProtonMail](https://protonmail.com), Swiss-based encrypted email. Sent with [ProtonMail](https://protonmail.com/) Secure Email.