[gtkada] 'hicolor' theme not found

[Roger Mc Murtrie]

Mac OSX 10.11.3
GPS 6.1.1 (20150118) hosted on x86_64-apple-darwin12.5.0
GNAT GPL 2015 (20150428-49)
gtkada-gpl-2015-src

When trying to run a small program that includes the code:
ComboBox := Gtk_Combo_Box_Text_New;
    		ComboBox.Append_Text ("A");

I get the following problem.
Much googling indicates that this is a common problem but I could find no solution.
hicolor-icon-theme and gnome-icon-theme are definitely installed.


(show_adaquant_dialog:16530): Gtk-WARNING **: Could not find the icon 'pan-down-symbolic-ltr'. The 'hicolor' theme was not found either, perhaps you need to install it.
You can get a copy from:
	http://icon-theme.freedesktop.org/releases

(show_adaquant_dialog:16530): Gtk-WARNING **: Error loading theme icon 'image-missing' for stock: Icon 'image-missing' not present in theme Adwaita

(show_adaquant_dialog:16530): Gtk-WARNING **: Error loading theme icon 'image-missing' for stock: Icon 'image-missing' not present in theme Adwaita

(show_adaquant_dialog:16530): GLib-GObject-CRITICAL **: g_object_ref: assertion 'G_IS_OBJECT (object)' failed
plus much more.

Assistance will be appreciated.
Roger