diff --git a/tools/rdbg4sasa/gtkgui.ml b/tools/rdbg4sasa/gtkgui.ml
index 90fe497dfa08785061717bd22579341fd2c5f1f1..eb21ff64054f0423bdbd9dca0faffc1768f7eaed 100644
--- a/tools/rdbg4sasa/gtkgui.ml
+++ b/tools/rdbg4sasa/gtkgui.ml
@@ -1,4 +1,4 @@
-(* Time-stamp: <modified the 03/06/2021 (at 12:02) by Erwan Jahier> *)
+(* Time-stamp: <modified the 03/06/2021 (at 14:35) by Erwan Jahier> *)
 
 #thread
 #require "lablgtk3"
@@ -115,22 +115,23 @@ let display_event b =
   blue_add b#buffer (str_of_sasa_event false !e)
 
 (**********************************************************************************)
-
+let custom_mode_ref = ref custom_mode
+  
 (*  *)
 let goto_hook_call e =
-  if custom_mode then
+  if !custom_mode_ref then
     next_cond e (fun e -> e.name = "mv_hook" && e.kind = Call)
   else
     e
 
 let goto_hook_exit e =
-  if custom_mode then
+  if !custom_mode_ref then
     next_cond e (fun e -> e.name = "mv_hook" && e.kind = Exit)
   else
     e
 
 let goto_top e =
-  if custom_mode then
+  if !custom_mode_ref then
     next_cond e (fun e -> e.kind = Ltop)
   else
     e
@@ -179,8 +180,10 @@ let init_rdbg_hook () =
       in
       Some res
   in
-  rdbg_mv_hook := Some guidaemon
-
+  match !rdbg_mv_hook with
+  | None -> rdbg_mv_hook := Some guidaemon
+  | _ -> () (* custom_mode_ref := false *)
+       
 let set_tooltip b = b#misc#set_tooltip_text 
 
 
@@ -571,7 +574,7 @@ let main () =
   legitimate_button#set_image image#coerce; 
 
   let set_daemongui_tbl = 
-    if custom_mode then
+    if !custom_mode_ref then
       custom_daemon p text_out w step_button back_step_button round_button legitimate_button      
     else
       (fun _ -> ())
@@ -579,7 +582,7 @@ let main () =
   let a_gui_step e =
     (* set the daemongui_tbl and step to the next event where the user
        is asked to choose whom to activate *)
-    if custom_mode then (
+    if !custom_mode_ref then (
       set_daemongui_tbl e;
       let e = goto_hook_exit e in
       let e = goto_hook_call e in
@@ -623,10 +626,10 @@ let main () =
   (* change_label legitimate_button "Silen_t"; *)
   ignore (legitimate_button#connect#clicked ~callback:
             (button_cb true true (fun () ->
-                 if custom_mode then legitimate_gui() else legitimate ())
+                 if !custom_mode_ref then legitimate_gui() else legitimate ())
             )
     );
-  if custom_mode then legitimate_button#misc#hide();
+  if !custom_mode_ref then legitimate_button#misc#hide();
   (* indeed, in the defaut mode (manual central), it should be hided *)
   let rec next_round_gui rn =
     if is_silent !e then () else e:=a_gui_step !e;
@@ -641,9 +644,9 @@ let main () =
   ignore (round_button#connect#clicked
             ~callback:(
               button_cb true true (fun () ->
-                  if custom_mode then (
+                  if !custom_mode_ref then (
                     next_round_gui !roundnb;
-                    if custom_mode && !e.name <> "mv_hook" && !e.kind <> Call
+                    if !custom_mode_ref && !e.name <> "mv_hook" && !e.kind <> Call
                        && not (is_silent !e)
                     then
                       e:= goto_hook_call !e