Hello Paul, > From here: > https://www.gnu.org/software/g-golf/manual/g-golf.html There is no G-Golf release yet - it is mentioned on the web-site, both the home page and in the install page ... but not in the manual indeed, didn't want to ... > $ guile -s example-1.scm # takes about 7 seconds > guile -s example-1.scm Please read the Getting Started with G-Golf, Selective Import ... you are importing the entire Gtk namespace - here, fwiw, if I do that, it takes 2sec, so mileage varies depending on the machine, mem ... > Backtrace: > ... > /home/paule/Projects/coot/git/g-golf/build/example-1.scm:14:4: In > procedure activate: In procedure module-lookup: Unbound variable: > set-child > Have I done something wrong? Yes :) you copied and run an example which is for Gtk-4.0, but loading Gtk-3.0 ... In the manual, 'Getting Started with G-Golf': "Please note that in the entire course of the G-Golf manual, unless otherwise specified, examples are based on and use Gtk-4.0, Gdk-4.0 and Gsk-4.0 - which is new and only available with Gtk-4.0." Below, an example for Gtk-3.0 ... David ;; below, ;; a hello-world example for GTk-3.0 #! /bin/sh # -*- mode: scheme; coding: utf-8 -*- exec guile -e main -s "$0" "$@" !# (eval-when (expand load eval) (use-modules (oop goops)) (default-duplicate-binding-handler '(merge-generics replace warn-override-core warn last)) (use-modules (g-golf)) (for-each (lambda (name) (gi-import-by-name "Gtk" name #:version "3.0")) '("Application" "ApplicationWindow" "Box" "Label" "Button"))) (define (activate app) (let ((window (make #:title "Hello" #:default-width 320 #:default-height 240 #:application app)) (box (make #:margin-top 6 #:margin-start 12 #:margin-bottom 6 #:margin-end 6 #:orientation 'vertical)) (label (make #:label "Hello, World!")) (button (make #:label "Close"))) (connect button 'clicked (lambda (b) (close window))) (add window box) (pack-start box label #t #t 0) (pack-start box button #f #f 6) (show-all window))) (define (main args) (let ((app (make #:application-id "org.gnu.tests"))) (connect app 'activate activate) (run app (length args) args)))