Error messages on DWT but required library is there

[Tower Ty]

When I run a program that imports 

import tango.io.Stdout;
import tango.time.StopWatch;
import tango.util.Convert;
import dwt.DWT;
import dwt.widgets.Display;
import dwt.widgets.Event;
import dwt.widgets.Shell;
import dwt.widgets.Text;
import dwt.widgets.Button;
import dwt.widgets.Dialog;
import dwt.widgets.MessageBox;
import dwt.widgets.Label;
import dwt.widgets.Table;
import dwt.widgets.TableItem;
import dwt.widgets.Listener;
import dwt.layout.RowLayout;
import dwt.layout.RowData;

It compiles OK and  when run it looks as it should but if I run it in a console window I get lots of the following . The library is installed properly with appropriate links to libgtk-x11-2.0.so.0.1000.11 and as far as I can see the path is fine . So why the runtime errors ? 

libgtk-x11-2.0.so: Symbol 'gtk_widget_get_tooltip_markup' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_set_tooltip_markup' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_get_tooltip_text' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_set_tooltip_text' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_trigger_tooltip_query' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_get_tooltip_window' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_set_tooltip_window' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_modify_cursor' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_error_bell' not found
libgtk-x11-2.0.so: Symbol 'gtk_widget_keynav_failed' not found
libgtk-x11-2.0.so: Symbol 'gtk_rc_parse_color_full' not found
libgtk-x11-2.0.so: Symbol 'gtk_drag_result_get_type' not found
libgtk-x11-2.0.so: Symbol 'gtk_builder_error_get_type' not found