diff --git a/ZEntreprises.py b/ZEntreprises.py
index 3da1ea1..dd7f504 100644
--- a/ZEntreprises.py
+++ b/ZEntreprises.py
@@ -562,7 +562,7 @@ class ZEntreprises(
                     % entreprise_contact_id
                 )
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         else:
             etudok = sco_entreprises.do_entreprise_check_etudiant(
                 self, tf[2]["etudiant"]
@@ -572,7 +572,7 @@ class ZEntreprises(
             else:
                 tf[2].update({"etudid": etudok[1]})
                 sco_entreprises.do_entreprise_contact_edit(self, tf[2])
-                REQUEST.RESPONSE.redirect(
+                return REQUEST.RESPONSE.redirect(
                     self.EntreprisesURL()
                     + "/entreprise_contact_list?entreprise_id="
                     + str(c["entreprise_id"])
@@ -680,13 +680,13 @@ class ZEntreprises(
         if tf[0] == 0:
             H.append(tf[1])
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(
+            return REQUEST.RESPONSE.redirect(
                 "%s/entreprise_correspondant_list?entreprise_id=%s"
                 % (self.EntreprisesURL(), c["entreprise_id"])
             )
         else:
             sco_entreprises.do_entreprise_correspondant_edit(self, tf[2])
-            REQUEST.RESPONSE.redirect(
+            return REQUEST.RESPONSE.redirect(
                 "%s/entreprise_correspondant_list?entreprise_id=%s"
                 % (self.EntreprisesURL(), c["entreprise_id"])
             )
@@ -789,7 +789,7 @@ class ZEntreprises(
         if tf[0] == 0:
             H.append(tf[1])
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         else:
             etudok = sco_entreprises.do_entreprise_check_etudiant(
                 self, tf[2]["etudiant"]
@@ -799,7 +799,7 @@ class ZEntreprises(
             else:
                 tf[2].update({"etudid": etudok[1]})
                 sco_entreprises.do_entreprise_contact_create(self, tf[2])
-                REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+                return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         H.append(entreprise_footer(self, REQUEST))
         return "\n".join(H)
 
@@ -828,12 +828,12 @@ class ZEntreprises(
         if tf[0] == 0:
             H.append(tf[1])
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         else:
             sco_entreprises.do_entreprise_contact_delete(
                 self, c["entreprise_contact_id"]
             )
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         H.append(entreprise_footer(self, REQUEST))
         return "\n".join(H)
 
@@ -935,10 +935,10 @@ class ZEntreprises(
         if tf[0] == 0:
             H.append(tf[1])
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         else:
             sco_entreprises.do_entreprise_correspondant_create(self, tf[2])
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         H.append(entreprise_footer(self, REQUEST))
         return "\n".join(H)
 
@@ -967,12 +967,12 @@ class ZEntreprises(
         if tf[0] == 0:
             H.append(tf[1])
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         else:
             sco_entreprises.do_entreprise_correspondant_delete(
                 self, c["entreprise_corresp_id"]
             )
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         H.append(entreprise_footer(self, REQUEST))
         return "\n".join(H)
 
@@ -1025,10 +1025,10 @@ class ZEntreprises(
         if tf[0] == 0:
             H.append(tf[1])
         elif tf[0] == -1:
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         else:
             sco_entreprises.do_entreprise_delete(self, E["entreprise_id"])
-            REQUEST.RESPONSE.redirect(self.EntreprisesURL())
+            return REQUEST.RESPONSE.redirect(self.EntreprisesURL())
         H.append(entreprise_footer(self, REQUEST))
         return "\n".join(H)
 
diff --git a/ZNotes.py b/ZNotes.py
index 553f353..f78684d 100644
--- a/ZNotes.py
+++ b/ZNotes.py
@@ -169,7 +169,7 @@ class ZNotes(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Impl
         "Changes the instance values"
         self.title = title
         self._p_changed = 1
-        RESPONSE.redirect("manage_editForm")
+        return RESPONSE.redirect("manage_editForm")
 
     def _getNotesCache(self):
         "returns CacheNotesTable instance for us"
diff --git a/ZScoDoc.py b/ZScoDoc.py
index 3de841a..59a26a6 100644
--- a/ZScoDoc.py
+++ b/ZScoDoc.py
@@ -399,7 +399,7 @@ class ZScoDoc(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
         except:
             admin_password_initialized = "0"
         if isAdmin and admin_password_initialized != "1":
-            REQUEST.RESPONSE.redirect(
+            return REQUEST.RESPONSE.redirect(
                 "ScoDoc/change_admin_user_form?message=Le%20mot%20de%20passe%20administrateur%20doit%20etre%20change%20!"
             )
 
diff --git a/ZScoUsers.py b/ZScoUsers.py
index 2550bb4..efe1eb9 100644
--- a/ZScoUsers.py
+++ b/ZScoUsers.py
@@ -1072,7 +1072,7 @@ class ZScoUsers(
                 parameters={"user_name": user_name},
             )
         self._user_delete(user_name)
-        REQUEST.RESPONSE.redirect(
+        return REQUEST.RESPONSE.redirect(
             self.UsersURL() + r"?head_message=Utilisateur%20supprimé"
         )
 
diff --git a/ZScolar.py b/ZScolar.py
index 0537b67..f61d6a4 100644
--- a/ZScolar.py
+++ b/ZScolar.py
@@ -206,11 +206,11 @@ class ZScolar(ObjectManager, PropertyManager, RoleManager, Item, Persistent, Imp
     # The for used to edit this object
     security.declareProtected(ScoView, "manage_editZScolar")
 
-    def manage_editZScolar(self, title, RESPONSE=None):
+    def manage_editZScolar(self, title, REQUEST=None):
         "Changes the instance values"
         self.title = title
         self._p_changed = 1
-        RESPONSE.redirect("manage_editForm")
+        return REQUEST.RESPONSE.redirect("manage_editForm")
 
     def _setup_initial_roles_and_permissions(self):
         """Initialize roles and permissions
@@ -321,43 +321,43 @@ REQUEST.URL0=%s<br/>
 
         # essai: liste des permissions
         # from AccessControl import getSecurityManager  # pylint: disable=import-error
-        from AccessControl.Permission import Permission  # pylint: disable=import-error
+        # from AccessControl.Permission import Permission  # pylint: disable=import-error
 
-        permissions = self.ac_inherited_permissions(1)
-        scoperms = [p for p in permissions if p[0][:3] == "Sco"]
-        # H.append( str(self.aq_parent.aq_parent.permission_settings()) )
-        # H.append('<p>perms: %s</p>'%str(scoperms))
-        # H.append('<p>valid_roles: %s</p>'%str(self.valid_roles()))
-        # H.append('<p>ac_inherited_permissions=%s</p>'%str(self.ac_inherited_permissions(1)))
-        def collect_roles(context, rd):
-            for p in scoperms:
-                name, value = p[:2]
-                P = Permission(name, value, context)
-                roles = list(P.getRoles())
-                if rd.has_key(name):
-                    rd[name] += roles
-                else:
-                    rd[name] = roles
-            if hasattr(context, "aq_parent"):
-                collect_roles(context.aq_parent, rd)
+        # permissions = self.ac_inherited_permissions(1)
+        # scoperms = [p for p in permissions if p[0][:3] == "Sco"]
+        # # H.append( str(self.aq_parent.aq_parent.permission_settings()) )
+        # # H.append('<p>perms: %s</p>'%str(scoperms))
+        # # H.append('<p>valid_roles: %s</p>'%str(self.valid_roles()))
+        # # H.append('<p>ac_inherited_permissions=%s</p>'%str(self.ac_inherited_permissions(1)))
+        # def collect_roles(context, rd):
+        #     for p in scoperms:
+        #         name, value = p[:2]
+        #         P = Permission(name, value, context)
+        #         roles = list(P.getRoles())
+        #         if rd.has_key(name):
+        #             rd[name] += roles
+        #         else:
+        #             rd[name] = roles
+        #     if hasattr(context, "aq_parent"):
+        #         collect_roles(context.aq_parent, rd)
 
-        b = ""
-        rd = {}
-        collect_roles(self, rd)
-        b = "<p>" + str(rd) + "</p>"
+        # b = ""
+        # rd = {}
+        # collect_roles(self, rd)
+        # b = "<p>" + str(rd) + "</p>"
 
-        authuser = REQUEST.AUTHENTICATED_USER
-        for p in scoperms:
-            permname, _ = p[:2]
-            b += "<p>" + permname + " : "
-            if authuser.has_permission(permname, self):
-                b += "yes"
-            else:
-                b += "no"
-            b += "</p>"
-        b += "<p>xxx</p><hr><p>" + str(self.aq_parent.aq_parent)
+        # authuser = REQUEST.AUTHENTICATED_USER
+        # for p in scoperms:
+        #     permname, _ = p[:2]
+        #     b += "<p>" + permname + " : "
+        #     if authuser.has_permission(permname, self):
+        #         b += "yes"
+        #     else:
+        #         b += "no"
+        #     b += "</p>"
+        # b += "<p>xxx</p><hr><p>" + str(self.aq_parent.aq_parent)
 
-        return self.sco_header(REQUEST) + str(b) + self.sco_footer(REQUEST)
+        # return self.sco_header(REQUEST) + str(b) + self.sco_footer(REQUEST)
 
     # essais calendriers:
     security.declareProtected(ScoView, "experimental_calendar")
@@ -1122,7 +1122,7 @@ REQUEST.URL0=%s<br/>
             },
         )
         logdb(REQUEST, cnx, method="addAnnotation", etudid=etudid)
-        REQUEST.RESPONSE.redirect("ficheEtud?etudid=" + etudid)
+        return REQUEST.RESPONSE.redirect("ficheEtud?etudid=" + etudid)
 
     security.declareProtected(ScoView, "canSuppressAnnotation")
 
@@ -1161,7 +1161,7 @@ REQUEST.URL0=%s<br/>
         logdb(REQUEST, cnx, method="SuppressAnnotation", etudid=etudid)
         scolars.etud_annotations_delete(cnx, annotation_id)
 
-        REQUEST.RESPONSE.redirect(
+        return REQUEST.RESPONSE.redirect(
             "ficheEtud?etudid=%s&amp;head_message=Annotation%%20supprimée" % (etudid)
         )
 
@@ -1231,7 +1231,7 @@ REQUEST.URL0=%s<br/>
             else:
                 scolars.adresse_create(cnx, args=tf[2])
             logdb(REQUEST, cnx, method="changeCoordonnees", etudid=etudid)
-            REQUEST.RESPONSE.redirect(dest_url)
+            return REQUEST.RESPONSE.redirect(dest_url)
 
     # --- Gestion des groupes:
     security.declareProtected(ScoView, "affectGroups")
diff --git a/sco_edit_module.py b/sco_edit_module.py
index 54ab900..1b15984 100644
--- a/sco_edit_module.py
+++ b/sco_edit_module.py
@@ -452,7 +452,7 @@ def formation_add_malus_modules(context, formation_id, titre=None, REQUEST=None)
             ue_add_malus_module(context, ue["ue_id"], titre=titre, REQUEST=REQUEST)
 
     if REQUEST:
-        REQUEST.RESPONSE.redirect("ue_list?formation_id=" + formation_id)
+        return REQUEST.RESPONSE.redirect("ue_list?formation_id=" + formation_id)
 
 
 def ue_add_malus_module(context, ue_id, titre=None, code=None, REQUEST=None):
diff --git a/sco_formsemestre_custommenu.py b/sco_formsemestre_custommenu.py
index 72e44bd..ae828c8 100644
--- a/sco_formsemestre_custommenu.py
+++ b/sco_formsemestre_custommenu.py
@@ -156,4 +156,4 @@ def formsemestre_custommenu_edit(context, formsemestre_id, REQUEST=None):
                         "url": tf[2]["url_" + custommenu_id],
                     },
                 )
-        REQUEST.RESPONSE.redirect(dest_url)
+        return REQUEST.RESPONSE.redirect(dest_url)
diff --git a/sco_formsemestre_edit.py b/sco_formsemestre_edit.py
index 556b512..09e9f44 100644
--- a/sco_formsemestre_edit.py
+++ b/sco_formsemestre_edit.py
@@ -1438,7 +1438,7 @@ def formsemestre_change_lock(
     args = {"formsemestre_id": formsemestre_id, "etat": etat}
     context.do_formsemestre_edit(args)
     if REQUEST:
-        REQUEST.RESPONSE.redirect(
+        return REQUEST.RESPONSE.redirect(
             "formsemestre_status?formsemestre_id=%s" % formsemestre_id
         )
 
@@ -1478,9 +1478,10 @@ def formsemestre_change_publication_bul(
     args = {"formsemestre_id": formsemestre_id, "bul_hide_xml": etat}
     context.do_formsemestre_edit(args)
     if REQUEST:
-        REQUEST.RESPONSE.redirect(
+        return REQUEST.RESPONSE.redirect(
             "formsemestre_status?formsemestre_id=%s" % formsemestre_id
         )
+    return None
 
 
 def formsemestre_edit_uecoefs(context, formsemestre_id, err_ue_id=None, REQUEST=None):
diff --git a/sco_formsemestre_validation.py b/sco_formsemestre_validation.py
index 5bda7b0..97b67a6 100644
--- a/sco_formsemestre_validation.py
+++ b/sco_formsemestre_validation.py
@@ -346,7 +346,7 @@ def formsemestre_validation_etud(
         raise ValueError("code choix invalide ! (%s)" % codechoice)
     #
     Se.valide_decision(choice, REQUEST)  # enregistre
-    _redirect_valid_choice(
+    return _redirect_valid_choice(
         formsemestre_id, etudid, Se, choice, desturl, sortcol, REQUEST
     )
 
@@ -393,7 +393,7 @@ def formsemestre_validation_etud_manu(
     #
     Se.valide_decision(choice, REQUEST)  # enregistre
     if redirect:
-        _redirect_valid_choice(
+        return _redirect_valid_choice(
             formsemestre_id, etudid, Se, choice, desturl, sortcol, REQUEST
         )
 
@@ -407,9 +407,9 @@ def _redirect_valid_choice(
     )
     if sortcol:
         adr += "&amp;sortcol=" + sortcol
-    if desturl:
-        desturl += "&amp;desturl=" + desturl
-    REQUEST.RESPONSE.redirect(adr)
+    # if desturl:
+    #    desturl += "&amp;desturl=" + desturl
+    return REQUEST.RESPONSE.redirect(adr)
     # Si le precedent a été modifié, demande relecture du parcours.
     # sinon  renvoie au listing general,
 
diff --git a/sco_moduleimpl_inscriptions.py b/sco_moduleimpl_inscriptions.py
index 3a4c535..43327b2 100644
--- a/sco_moduleimpl_inscriptions.py
+++ b/sco_moduleimpl_inscriptions.py
@@ -183,7 +183,7 @@ def moduleimpl_inscriptions_edit(
         sco_moduleimpl.do_moduleimpl_inscrit_etuds(
             context, moduleimpl_id, formsemestre_id, etuds, reset=True, REQUEST=REQUEST
         )
-        REQUEST.RESPONSE.redirect(
+        return REQUEST.RESPONSE.redirect(
             "moduleimpl_status?moduleimpl_id=%s" % (moduleimpl_id)
         )
     #
diff --git a/sco_saisie_notes.py b/sco_saisie_notes.py
index 9602fae..7decaf7 100644
--- a/sco_saisie_notes.py
+++ b/sco_saisie_notes.py
@@ -949,9 +949,15 @@ def saisie_notes(context, evaluation_id, group_ids=[], REQUEST=None):
     H.append("""</td></tr></table></div>""")
 
     # Le formulaire de saisie des notes:
-    form = _form_saisie_notes(context, E, M, groups_infos.group_ids, REQUEST=REQUEST)
+    destination = "%s/Notes/moduleimpl_status?moduleimpl_id=%s" % (
+        context.ScoURL(),
+        E["moduleimpl_id"],
+    )
+    form = _form_saisie_notes(
+        context, E, M, groups_infos.group_ids, destination=destination, REQUEST=REQUEST
+    )
     if form is None:
-        return ""  # redirect
+        return REQUEST.RESPONSE.redirect(destination)
     H.append(form)
     #
     H.append("</div>")  # /saisie_notes
@@ -1041,7 +1047,7 @@ def _get_sorted_etuds(context, E, etudids, formsemestre_id):
     return etuds
 
 
-def _form_saisie_notes(context, E, M, group_ids, REQUEST=None):
+def _form_saisie_notes(context, E, M, group_ids, destination="", REQUEST=None):
     """Formulaire HTML saisie des notes  dans l'évaluation E du moduleimpl M
     pour les groupes indiqués.
 
@@ -1176,11 +1182,6 @@ def _form_saisie_notes(context, E, M, group_ids, REQUEST=None):
         )
     # H.append('''<div id="sco_msg" class="head_message"></div>''')
 
-    destination = "%s/Notes/moduleimpl_status?moduleimpl_id=%s" % (
-        context.ScoURL(),
-        M["moduleimpl_id"],
-    )
-
     tf = TF(
         destination,
         REQUEST.form,
@@ -1191,7 +1192,6 @@ def _form_saisie_notes(context, E, M, group_ids, REQUEST=None):
     )
     H.append(tf.getform())  # check and init
     if tf.canceled():
-        REQUEST.RESPONSE.redirect(destination)
         return None
     elif (not tf.submitted()) or not tf.result:
         # ajout formularie saisie notes manquantes
@@ -1213,7 +1213,6 @@ def _form_saisie_notes(context, E, M, group_ids, REQUEST=None):
     else:
         # form submission
         # rien à faire
-        REQUEST.RESPONSE.redirect(destination)
         return None