diff --git a/app/comp/moy_sem.py b/app/comp/moy_sem.py
index 2aec3b736..db42616c8 100644
--- a/app/comp/moy_sem.py
+++ b/app/comp/moy_sem.py
@@ -65,7 +65,7 @@ def compute_sem_moys_apc_using_ects(
         moy_gen = (etud_moy_ue_df * ects).sum(axis=1) / sum(ects)
     except TypeError:
         if None in ects:
-            flash(f"""Calcul moyenne générale impossible: ECTS des UE manquants !""")
+            flash("""Calcul moyenne générale impossible: ECTS des UE manquants !""")
             moy_gen = pd.Series(np.NaN, index=etud_moy_ue_df.index)
         else:
             raise
diff --git a/app/comp/res_common.py b/app/comp/res_common.py
index 6a821ac69..7d2eb5ae3 100644
--- a/app/comp/res_common.py
+++ b/app/comp/res_common.py
@@ -9,7 +9,7 @@ from functools import cached_property
 import numpy as np
 import pandas as pd
 
-from flask import g, url_for
+from flask import g, flash, url_for
 
 from app import log
 from app.comp.aux_stats import StatsMoyenne
@@ -419,21 +419,31 @@ class NotesTableCompat(ResultatsSemestre):
         """Stats (moy/min/max) sur la moyenne générale"""
         return StatsMoyenne(self.etud_moy_gen)
 
-    def get_ues_stat_dict(self, filter_sport=False):  # was get_ues()
+    def get_ues_stat_dict(
+        self, filter_sport=False, check_apc_ects=True
+    ) -> list[dict]:  # was get_ues()
         """Liste des UEs, ordonnée par numero.
         Si filter_sport, retire les UE de type SPORT.
         Résultat: liste de dicts { champs UE U stats moyenne UE }
         """
-        ues = []
-        for ue in self.formsemestre.query_ues(with_sport=not filter_sport):
+        ues = self.formsemestre.query_ues(with_sport=not filter_sport)
+        ues_dict = []
+        for ue in ues:
             d = ue.to_dict()
             if ue.type != UE_SPORT:
                 moys = self.etud_moy_ue[ue.id]
             else:
                 moys = None
             d.update(StatsMoyenne(moys).to_dict())
-            ues.append(d)
-        return ues
+            ues_dict.append(d)
+        if check_apc_ects and self.is_apc and not hasattr(g, "checked_apc_ects"):
+            g.checked_apc_ects = True
+            if None in [ue.ects for ue in ues if ue.type != UE_SPORT]:
+                flash(
+                    """Calcul moyenne générale impossible: ECTS des UE manquants !""",
+                    category="danger",
+                )
+        return ues_dict
 
     def get_modimpls_dict(self, ue_id=None) -> list[dict]:
         """Liste des modules pour une UE (ou toutes si ue_id==None),
diff --git a/app/scodoc/html_sco_header.py b/app/scodoc/html_sco_header.py
index 23a8b8340..653cdb80d 100644
--- a/app/scodoc/html_sco_header.py
+++ b/app/scodoc/html_sco_header.py
@@ -30,7 +30,7 @@
 
 import html
 
-from flask import g
+from flask import render_template
 from flask import request
 from flask_login import current_user
 
@@ -280,6 +280,9 @@ def sco_header(
     if not no_side_bar:
         H.append(html_sidebar.sidebar())
     H.append("""<div id="gtrcontent">""")
+    # En attendant le replacement complet de cette fonction,
+    # inclusion ici des messages flask
+    H.append(render_template("flashed_messages.html"))
     #
     # Barre menu semestre:
     H.append(formsemestre_page_title())
diff --git a/app/scodoc/sco_edit_ue.py b/app/scodoc/sco_edit_ue.py
index 73e77dbbd..8cc3269a1 100644
--- a/app/scodoc/sco_edit_ue.py
+++ b/app/scodoc/sco_edit_ue.py
@@ -472,8 +472,10 @@ def ue_edit(ue_id=None, create=False, formation_id=None, default_semestre_idx=No
                         "semestre_id": tf[2]["semestre_idx"],
                     },
                 )
+            flash("UE créée")
         else:
             do_ue_edit(tf[2])
+            flash("UE modifiée")
         return flask.redirect(
             url_for(
                 "notes.ue_table",
diff --git a/app/static/css/scodoc.css b/app/static/css/scodoc.css
index 3b80f7d6d..b3a80640a 100644
--- a/app/static/css/scodoc.css
+++ b/app/static/css/scodoc.css
@@ -138,7 +138,7 @@ div.head_message {
    border-radius: 8px;
    font-family : arial, verdana, sans-serif ;
    font-weight: bold;
-   width: 40%;
+   width: 70%;
    text-align: center;
 }