diff --git a/callback.c b/callback.c
index c58d11f..4298e14 100644
--- a/callback.c
+++ b/callback.c
@@ -197,13 +197,18 @@ 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) {
-  printf("callback.c (line 200)  -  SAVE_CURRENT_MODEL_BEFORE_EDITING\n");
+  gtk_widget_set_sensitive (GTK_WIDGET (data), TRUE);
+  printf ("callback.c (line 200)  -  SAVE_CURRENT_MODEL_BEFORE_EDITING\n");
 }
 
 void on_DISCARD_CURRENT_MODEL_AND_START_EDITING (GtkWidget *btt_SAVE_CURRENT_MODEL, gpointer data) {
-  printf("callback.c (line 204)  -  DISCARD_CURRENT_MODEL_AND_START_EDITING\n");
+  gtk_widget_set_sensitive (GTK_WIDGET (data), FALSE);
+  printf ("callback.c (line 204)  -  DISCARD_CURRENT_MODEL_AND_START_EDITING\n");
 }
 
-void on_WRITE_THE_CURRENT_MODEL (GtkWidget *btt_WRITE_CURRENT_MODEL, gpointer data) {
-  printf("callback.c (line 208)  -  WRITE_THE_CURRENT_MODEL\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");
 }
+
diff --git a/callback.h b/callback.h
index 72f86f1..7f0d3fc 100644
--- a/callback.h
+++ b/callback.h
@@ -20,7 +20,7 @@ void on_toggle_state_rules (GtkWidget *btt_toggle_state_rules, gpointer data);
 void on_toggle_observ_interpret (GtkWidget *btt_toggle_observ_interpret, gpointer data);
 void on_SAVE_CURRENT_MODEL_BEFORE_EDITING (GtkWidget *btt_SAVE_CURRENT_MODEL, gpointer data);
 void on_DISCARD_CURRENT_MODEL_AND_START_EDITING (GtkWidget *btt_SAVE_CURRENT_MODEL, gpointer data);
-void on_WRITE_THE_CURRENT_MODEL (GtkWidget *btt_WRITE_CURRENT_MODEL, gpointer data);
+void on_WRITE_CURRENT_MODEL (GtkWidget *btt_WRITE_CURRENT_MODEL, gpointer data);
 
 
 
diff --git a/dialog.c b/dialog.c
index 53a3c2b..d7be7ee 100644
--- a/dialog.c
+++ b/dialog.c
@@ -23,17 +23,18 @@ void dialog_window_design (GtkWindow *main_window, GtkWindow *dialog_window){
 //  gtk_box_layout_set_homogeneous (GTK_BOX (YES_NO_box), TRUE);
 //  gtk_box_set_baseline_position (YES_NO_box, GTK_BASELINE_POSITION_CENTER);
 
+  GtkButton *action_save_current_model = GTK_BUTTON (gtk_button_new_with_label ("SAVE THE CURRENT MODEL"));
+  gtk_widget_set_sensitive (GTK_WIDGET (action_save_current_model), FALSE);
+  g_signal_connect (action_save_current_model, "clicked", G_CALLBACK (on_WRITE_CURRENT_MODEL), dialog_window);
+
   GtkButton *click_yes = GTK_BUTTON (gtk_button_new_with_label ("YES"));
-  g_signal_connect (click_yes, "clicked", G_CALLBACK (on_SAVE_CURRENT_MODEL_BEFORE_EDITING), NULL);
+  g_signal_connect (click_yes, "clicked", G_CALLBACK (on_SAVE_CURRENT_MODEL_BEFORE_EDITING), action_save_current_model);
   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), NULL);
+  g_signal_connect (click_no, "clicked", G_CALLBACK (on_DISCARD_CURRENT_MODEL_AND_START_EDITING), action_save_current_model);
   gtk_box_append (YES_NO_box, GTK_WIDGET (click_no));
 
-  GtkButton *action_save_current_model = GTK_BUTTON (gtk_button_new_with_label ("SAVE THE CURRENT MODEL"));
-  g_signal_connect (click_no, "clicked", G_CALLBACK (on_WRITE_THE_CURRENT_MODEL), NULL);
-
   GtkBox *WINDOW_CHILD_box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_VERTICAL, 0));
   gtk_box_append (WINDOW_CHILD_box, GTK_WIDGET (YES_NO_box));
   gtk_box_append (WINDOW_CHILD_box, GTK_WIDGET (gtk_separator_new (GTK_ORIENTATION_VERTICAL)));
@@ -42,8 +43,8 @@ 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_modal (GTK_WINDOW (dialog_window), TRUE);
+//  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));
 }