diff --git a/callback.c b/callback.c
index 4298e14..92f2d6f 100644
--- a/callback.c
+++ b/callback.c
@@ -198,17 +198,16 @@ void on_toggle_observ_interpret (GtkWidget *btt_toggle_observ_interpret, gpointe
 
 void on_SAVE_CURRENT_MODEL_BEFORE_EDITING (GtkWidget *btt_SAVE_CURRENT_MODEL, gpointer data) {
   gtk_widget_set_sensitive (GTK_WIDGET (data), TRUE);
-  printf ("callback.c (line 200)  -  SAVE_CURRENT_MODEL_BEFORE_EDITING\n");
+  printf ("callback.c (line 201)  -  SAVE_CURRENT_MODEL_BEFORE_EDITING\n");
 }
 
 void on_DISCARD_CURRENT_MODEL_AND_START_EDITING (GtkWidget *btt_SAVE_CURRENT_MODEL, gpointer data) {
-  gtk_widget_set_sensitive (GTK_WIDGET (data), FALSE);
-  printf ("callback.c (line 204)  -  DISCARD_CURRENT_MODEL_AND_START_EDITING\n");
+  gtk_window_close (GTK_WINDOW (data));
+  printf ("callback.c (line 206)  -  DISCARD_CURRENT_MODEL_AND_START_EDITING\n");
 }
 
 void on_WRITE_CURRENT_MODEL (GtkWidget *btt_WRITE_CURRENT_MODEL, gpointer data) {
-//  close_request (GTK_WINDOW (data));  <  comment fermer la fenêtre ?   TODO
-//  attention: déclaration implicite de la fonction « close_request »
-  printf ("callback.c (line 208)  -  WRITE_THE_CURRENT_MODEL\n");
+  gtk_window_close (GTK_WINDOW (data));
+  printf ("callback.c (line 211)  -  WRITE_CURRENT_MODEL\n");
 }
 
diff --git a/dialog.c b/dialog.c
index d7be7ee..9c01762 100644
--- a/dialog.c
+++ b/dialog.c
@@ -32,7 +32,7 @@ void dialog_window_design (GtkWindow *main_window, GtkWindow *dialog_window){
   gtk_box_append (YES_NO_box, GTK_WIDGET (click_yes));
 
   GtkButton *click_no = GTK_BUTTON (gtk_button_new_with_label ("NO"));
-  g_signal_connect (click_no, "clicked", G_CALLBACK (on_DISCARD_CURRENT_MODEL_AND_START_EDITING), action_save_current_model);
+  g_signal_connect (click_no, "clicked", G_CALLBACK (on_DISCARD_CURRENT_MODEL_AND_START_EDITING), dialog_window);
   gtk_box_append (YES_NO_box, GTK_WIDGET (click_no));
 
   GtkBox *WINDOW_CHILD_box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
@@ -43,7 +43,7 @@ void dialog_window_design (GtkWindow *main_window, GtkWindow *dialog_window){
 
   gtk_window_set_transient_for (GTK_WINDOW (dialog_window), GTK_WINDOW (main_window));
   gtk_window_set_destroy_with_parent (GTK_WINDOW (dialog_window), TRUE);
-//  gtk_window_set_deletable (GTK_WINDOW (dialog_window), FALSE); //  FALSE
+  gtk_window_set_deletable (GTK_WINDOW (dialog_window), FALSE); //  FALSE
   gtk_window_set_modal (GTK_WINDOW (dialog_window), TRUE);
   gtk_window_present (GTK_WINDOW (dialog_window));
 }