Hello again and thanks for your informative answer! The problem had already been filed upstream (bug 580055, https://bugzilla.gnome.org/show_bug.cgi?id=580055 ). It is caused by the program not handling correctly not having enough sudokus to print.
An ugly work-around: 1) Run dconf-editor. 2) Search for gnome-sudoku 3) Make sure that "generate-endlessly" flag, and the "generate-target-<difficulty>" flags corresponding to the level of the sudokus you want to print are set. 4) Close dconf-editor 5) Start gnome-sudoku. Leave it running a few minutes, to allow it to generate enough new puzzles. 6) Print the sudokus. Best regards! ** Bug watch added: GNOME Bug Tracker #580055 https://bugzilla.gnome.org/show_bug.cgi?id=580055 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-sudoku in Ubuntu. https://bugs.launchpad.net/bugs/1310157 Title: Printing multiple sudokus does not work Status in “gnome-sudoku” package in Ubuntu: New Bug description: Hello! Package version: 1:3.10.2-0ubuntu2. Xubuntu 14.04 To reproduce: 1) Go to game -> print multiple sudokus. The "Print Sudokus" window appears. 2) Click the "Print" button. The "Print" window appears. 3) Click "Print" again. Expected result: sudokus are printed. Observed behavior: the "Print" window is closed, and nothing else happens. If run from the console, this error message appears: (gnome-sudoku:7257): Gtk-CRITICAL **: gtk_print_operation_set_n_pages: assertion 'n_pages > 0' failed Best regards! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-sudoku/+bug/1310157/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

