diff --git a/src/ui/contain.c b/src/ui/contain.c
index af9841b..8bf510f 100644
--- a/src/ui/contain.c
+++ b/src/ui/contain.c
@@ -181,13 +181,14 @@ void window_bar(GtkWindow *window, char *title){
 void experimental_activate_00 (GtkApplication *app, GtkWindow *window) {
 //  window_bar (window, "E coli   (with permission from David S. Goodsell, 2009)");
   GtkWidget *my_header_bar = gtk_header_bar_new ();
-  gtk_header_bar_set_title_widget (my_header_bar, GTK_WIDGET (gtk_label_new ("E coli   (with permission from David S. Goodsell, 2009)")));
+  gtk_header_bar_set_title_widget (GTK_HEADER_BAR (my_header_bar), GTK_WIDGET (gtk_label_new ("E coli   (with permission from David S. Goodsell, 2009)")));
   GtkWidget *run_edit = gtk_toggle_button_new ();
-  gtk_button_set_icon_name (run_edit, "document-edit-symbolic");
-  gtk_button_set_icon_name (run_edit, "system-run-symbolic");
+  gtk_button_set_icon_name (GTK_BUTTON (run_edit), "document-edit-symbolic");
+  gtk_button_set_icon_name (GTK_BUTTON (run_edit), "system-run-symbolic");
 //  gtk_toggle_button_set_active (run_edit, TRUE);
 //  gtk_actionable_set_action_name (run_edit, "togglerunedit");
-  gtk_header_bar_pack_start (my_header_bar, run_edit);
+//  gtk_actionable_set_action_target_value (GTK_WIDGET (run_edit), "togglerunedit"); // ui_toggle_run_edit()   GVariant
+  gtk_header_bar_pack_start (GTK_HEADER_BAR (my_header_bar), run_edit);
   gtk_window_set_titlebar (window, my_header_bar);