package lilypond-doc (not installed) failed to install/upgrade: le sous-processus script post-removal installé a retourné une erreur de sortie d'état 1

[Maurice Clerc]

Ubuntu 14.10
The system proposed me a lot of updates. I accepted. It began to work, and then displayed the message saying it could not upgrade lilypond.

BTW, the Ubuntu 14.10 version has been automatically proposed to me as a LTS one (I do insist: LTS, I did not ask for development versions) as I had the version 12, and unfortunately, I accepted. But now, trying to using my computer is a nightmare. A lot of applications I have to use crash very often or simply do not work anymore (LyX, Anjuta, SciLab, Hugin, Lucky Backup, ...). When I write a paper with LyX, I have to save my work on a USB key every 2 minutes (when LyX crashes, even the emergency file is corrupted).

Is there a way to go back to a stable version that works?

ProblemType: Package
DistroRelease: Ubuntu 14.10
Package: lilypond-doc (not installed)
ProcVersionSignature: Ubuntu 3.16.0-14.20-generic 3.16.2
Uname: Linux 3.16.0-14-generic i686
ApportVersion: 2.14.7-0ubuntu2
Architecture: i386
Date: Tue Sep 16 17:31:11 2014
DuplicateSignature: package:lilypond-doc:(not installed):le sous-processus script post-removal installé a retourné une erreur de sortie d'état 1
ErrorMessage: le sous-processus script post-removal installé a retourné une erreur de sortie d'état 1
SourcePackage: lilypond
Title: package lilypond-doc (not installed) failed to install/upgrade: le sous-processus script post-removal installé a retourné une erreur de sortie d'état 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jon Arnold (jonarnoldsemail)]

Here's the info I got:

Could not install '/var/cache/apt/archives/lilypond-doc_2.18.0-1_all.deb'

The upgrade will continue but the '/var/cache/apt/archives/lilypond-doc_2.18.0-1_all.deb' package may not be in a working state. Please consider submitting a bug report about it.

dpkg-maintscript-helper: error: original symlink target is not an absolute path
subprocess new pre-installation script returned error exit status 1