SUMMARY I get the error message "Die angeforderte Hilfedatei ist nicht lesbar:<br />/usr/share/doc/kde/HTML/en/krusader/index.docbook" (the first part means that the help file is not readable). I checked that such a file exists: ls -l /usr/share/doc/kde/HTML/en/krusader/index.docbook -rw-r--r-- 1 root root 11510 Okt 21 2012 /usr/share/doc/kde/HTML/en/krusader/index.docbook STEPS TO REPRODUCE 1. start krusader 2. press <F1> 3. OBSERVED RESULT the error message "Die angeforderte Hilfedatei ist nicht lesbar:<br />/usr/share/doc/kde/HTML/en/krusader/index.docbook" EXPECTED RESULT entering the help system of krusader. SOFTWARE VERSIONS (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: qmake --version QMake version 3.0 Using Qt version 5.5.1 in /usr/lib/x86_64-linux-gnu ADDITIONAL INFORMATION The error happens with Xubuntu 16.04.5 LTS
Is the problem still present? Did you tried to reinstall Krusader?
(In reply to Davide Gianforte from comment #1) > Is the problem still present? Did you tried to reinstall Krusader? Davide, thank you for looking at this very old book. Meanwhile I have upgraded the version of the operating system from Xubuntu 16.04 to Xubuntu 18.04.4 LTS. During these changes I also have reinstalled Krusader, which is for me the best file management tool. In general I use Thunar, but once I have something not very basic in mind, I switch to Krusader. Now I have Krusader version 2.6.0 „stiff challenges“. When I press F1 in this version of Krusader, firefox opens https://docs.kde.org/stable5/de/extragear-utils/krusader// which shows me a Krusader manual of version 2.7.2 (2019-08-25). Searching the place on my computer where a local version of the handbook should reside, I find that it is not there. But now I have a German installation and there exists a similar place: a@w:~$ ls -lR /usr/share/doc/kde/HTML/de/onlinehelp/ /usr/share/doc/kde/HTML/de/onlinehelp/: insgesamt 8 lrwxrwxrwx 1 root root 9 2018-03-17 15:45 common -> ../common -rw-r--r-- 1 root root 1835 2018-03-17 15:45 index.cache.bz2 -rw-r--r-- 1 root root 3272 2013-07-08 16:25 index.docbook a@w:~$ Looking at the time stamps of those files, they must be outdated (comparing them to the version in the internet). Any idea how to install a local version of the handbook belonging to my version of Krusader?
According to https://packages.ubuntu.com/bionic/amd64/krusader/filelist, local help files should be placed in /usr/share/doc/HTML/de/krusader/ The absence of these files could explain why the online help is opened.
(In reply to Davide Gianforte from comment #3) > According to https://packages.ubuntu.com/bionic/amd64/krusader/filelist, > local help files should be placed in /usr/share/doc/HTML/de/krusader/ > > The absence of these files could explain why the online help is opened. Thank you for this quick help. BTW: do you know from where to download the German help for Krusader such that it can be used locally, i.e. in order to the folder given by you?
In order to try to use what you have already installed in your system: what does it happen if you execute khelpcenter help:/krusader ?
(In reply to Toni Asensi Esteve from comment #5) > In order to try to use what you have already installed in your system: what > does it happen if you execute > khelpcenter help:/krusader > ? first, khelpcenter was not installed. Then I installed it. The I followed your advice and invoked it from the command line as khelpcenter help:/krusader Then a German version of the Krusader help ("Das Handbuch zu Krusader") opened! Great! The terminal showed these lines: a@w:~$ khelpcenter help:/krusader kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "khelpcenter" kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "khelpcenter" kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "khelpcenter" kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "khelpcenter" kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "glossentry" Icon theme "adwaita" not found. kf5.kservice.services: KServiceTypeTrader: serviceType "QImageIOPlugins" not found Icon theme "adwaita" not found. QWidget::paintEngine: Should no longer be called QPainter::begin: Paint device returned engine == 0, type: 1 QPainter::translate: Painter not active QPainter::setClipRect: Painter not active QPainter::hasClipping: Painter not active QPainter::setPen: Painter not active QPainter::setBrush: Painter not active QPainter::drawRects: Painter not active QPainter::hasClipping: Painter not active QPainter::setPen: Painter not active QPainter::setBrush: Painter not active QPainter::drawRects: Painter not active QPainter::hasClipping: Painter not active QPainter::setPen: Painter not active QPainter::setBrush: Painter not active QPainter::hasClipping: Painter not active QPainter::setPen: Painter not active QPainter::setBrush: Painter not active QPainter::hasClipping: Painter not active QPainter::setPen: Painter not active QPainter::setBrush: Painter not active QPainter::hasClipping: Painter not active QPainter::setPen: Painter not active QPainter::setBrush: Painter not active a@w:~$ Then I closed the help center and started Krusader. Then I could invoke the Krusader help from Krusader by pressing F1. I am completely satisfied with the solution. Thank you for reopening this age-old case. We can close this issue as resolved&fixed! Tahnk you!