Known Issues

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This page provides answers to issues that users have encountered when installing PANGU.


QGtkStyle was unable to detect the current GTK+ theme [SPR00029]

This error might occur when running the PANGU Qt viewers under Linux when using XFCE, LXDE or KDE desktops with Ubuntu 18.04. This affects any Qt application, not just PANGU.

The simplest solution is to define the following environment variable:

GTK2_RC_FILES="$HOME/.gtkrc-2.0:/etc/gtk-2.0/gtkrc"

If neither of those configuration files exists then create a text file called .gtkrc-2.0 in your home directory and add the following line of text to it:

 gtk-theme-name="GTK+"

Save the file and the issue ought to be resolved.

For more details see http://alien.slackbook.org/blog/running-vlc-in-xfce/

Failed to load module "canberra-gtk-module" [SPR00030]

This error might occur when running the PANGU Qt viewers under Linux when using XFCE, LXDE or KDE desktops with Ubuntu 18.04. This affects any Qt application, not just PANGU.

The problem is due to the specified module not being installed on your system.

Ubuntu users might be able to resolve this issue by using this command:

sudo apt install libcanberra-gtk-module

CentOS users might need to use one of these commands instead:

sudo yum install libcanberra-gtk2
sudo yum install libcanberra-gtk3

See https://askubuntu.com/questions/208431/failed-to-load-module-canberra-gtk-module or https://askubuntu.com/questions/971560/what-is-the-purpose-of-canberra-gtk-module for more details.

Save-as crash/freeze using Qt5 on Windows 7 on a Dell [SPR00042]

The Dell Backup and Recovery tool on Windows 7 causes Qt5 applications (such as the viewer) to crash when opening a file manager dialog e.g. using “Save Image As”. After the crash Windows 7 will adjust the way in which the viewer runs which will prevent a crash for the affected dialog window only. However, the dialog will be blank except “Save” and “Cancel” buttons. Pressing the “Cancel” button and then trying again will work around the issue for that dialog until the viewer quits. The process must be repeated for the other file dialogs.

For more details please refer to the following bug report from May 2015: https://www.dell.com/community/Productivity-Software/Backup-and-Recovery-causing-applications-using-Qt5-DLLs-to-crash/td-p/4590325

Uninstalling the Dell Backup and Recovery tool will resolve the issue.