[Bug 2053228] Re: software-properties-gtk does not start

[Colin]

I deleted the files in the /etc/apt/sources.list.d and then it opened normally except all the sources where unselected.
When software and properties is opened again just tick the appropriate sources from the first tab and select close and reload at the prompt. After that it has worked normally again.

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https://bugs.launchpad.net/bugs/2053228

Title:
  software-properties-gtk does not start

Status in software-properties package in Ubuntu:
  Triaged

Bug description:
  On a new install with the new format sources.list software-properties-gtk does not start:
  corrado at corrado-n4-nn-0215:~$ software-properties-gtk
  Traceback (most recent call last):
    File "/usr/bin/software-properties-gtk", line 100, in <module>
      app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 163, in __init__
      SoftwareProperties.__init__(self, options=options, datadir=datadir,
    File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 109, in __init__
      self.backup_sourceslist()
    File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 437, in backup_sourceslist
      source_bkp = SourceEntry(line=source.line,file=source.file)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/aptsources/sourceslist.py", line 509, in __init__
      raise ValueError("Classic SourceEntry cannot be written to .sources file")
  ValueError: Classic SourceEntry cannot be written to .sources file
  corrado at corrado-n4-nn-0215:~$

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: software-properties-gtk 0.99.42
  ProcVersionSignature: Ubuntu 6.6.0-14.14-generic 6.6.3
  Uname: Linux 6.6.0-14-generic x86_64
  ApportVersion: 2.27.0-0ubuntu6
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Feb 15 10:07:43 2024
  InstallationDate: Installed on 2024-02-15 (0 days ago)
  InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Daily amd64 (20240215)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: software-properties
  UpgradeStatus: No upgrade log present (probably fresh install)

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