I can reproduce this error as follows: (<unknown>:2659): Gtk-CRITICAL **: gtk_widget_is_ancestor: assertion `ancestor != NULL' failed
* Start J Gtk IDE from a terminal session ($ jconsole gtkide) * Open Edit window. * Open multiple tabs in the Edit window * Position the mouse pointer on a tab and use the scroll-wheel to scroll through the open tabs. * The error is reported in the terminal window (if open) Note that there doesn't seem to be a problem with functionality (scrolling between tabs works ok) and J continues to work fine in other respects (AFAICS), however every time the scroll-button is scrolled "one-click" the error appears in the terminal window. JVERSION Engine: j701/2011-01-10/11:25 Library: 7.01.045 Platform: Linux 64 Installer: j701a_linux64.sh InstallPath: /usr/local/lib/j64_701 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
