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GTK Error in Eclipse RCP

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GTK Error in Eclipse RCP

 Many times while testing eclipse RCP application, you will see following error:

 ------------------------------------------------------------------------------------------------------------
(eclipse:2960): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(eclipse:2960): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE' (instance) failed

(eclipse:2960): Gtk-CRITICAL **: IA__gtk_screen_get_display: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gtk-WARNING **: Screen for GtkWindow not set; you must always set a screen for a GtkWindow before using the window

(eclipse:2960): Gtk-WARNING **: Screen for GtkWindow not set; you must always set a screen for a GtkWindow before using the window

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_display: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_display_get_pointer: assertion 'GDK_IS_DISPLAY (display)' failed

(eclipse:2960): Gtk-WARNING **: Screen for GtkWindow not set; you must always set a screen for a GtkWindow before using the window

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_n_monitors: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gtk-WARNING **: Screen for GtkWindow not set; you must always set a screen for a GtkWindow before using the window

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_monitors_geometry: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_default_colormap: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_colormap_get_visual: assertion 'GDK_IS_COLORMAP (colormap)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_default_colormap: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_root_window: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_screen_get_root_window: assertion 'GDK_IS_SCREEN (screen)' failed

(eclipse:2960): Gdk-CRITICAL **: IA__gdk_window_new: assertion 'GDK_IS_WINDOW (parent)' failed
Segmentation fault
---------------------------------------------------------------------------------------

Solution:
The cause of the occurrence of this error is , it it now able to find $DISPLAY varialbe. So better setup $DISPLAY , environemt variable. Other possibility is your VNC has disabled xhost
so try out following commands :
$> setenv DISPLAY :0
$> xhost 

 I hope this will resolve your error.

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