diff --git a/app/models/moduleimpls.py b/app/models/moduleimpls.py
index d51a620b0..700dec26e 100644
--- a/app/models/moduleimpls.py
+++ b/app/models/moduleimpls.py
@@ -79,7 +79,7 @@ class ModuleImpl(db.Model):
         )
 
     def to_dict(self):
-        """as a dict, with the same conversions as in ScoDoc7"""
+        """as a dict, with the same conversions as in ScoDoc7, including module"""
         e = dict(self.__dict__)
         e.pop("_sa_instance_state", None)
         # ScoDoc7 output_formators: (backward compat)
diff --git a/app/scodoc/sco_abs.py b/app/scodoc/sco_abs.py
index 0b38559f7..733452967 100644
--- a/app/scodoc/sco_abs.py
+++ b/app/scodoc/sco_abs.py
@@ -479,7 +479,7 @@ def _get_abs_description(a, cursor=None):
             )
             if Mlist:
                 M = Mlist[0]
-                module += "%s " % M["module"]["code"]
+                module += "%s " % (M["module"]["code"] or "(module sans code)")
 
     if desc:
         return "(%s) %s" % (desc, module)
diff --git a/app/scodoc/sco_abs_views.py b/app/scodoc/sco_abs_views.py
index d92ee8559..686d589d7 100644
--- a/app/scodoc/sco_abs_views.py
+++ b/app/scodoc/sco_abs_views.py
@@ -127,7 +127,9 @@ def doSignaleAbsence(
             modimpls = nt.get_modimpls_dict(ue_id=ue["ue_id"])
             for modimpl in modimpls:
                 if modimpl["moduleimpl_id"] == moduleimpl_id:
-                    indication_module = "dans le module %s" % modimpl["module"]["code"]
+                    indication_module = "dans le module %s" % (
+                        modimpl["module"]["code"] or "(pas de code)"
+                    )
     H = [
         html_sco_header.sco_header(
             page_title=f"Signalement d'une absence pour {etud.nomprenom}",
@@ -218,7 +220,7 @@ def SignaleAbsenceEtud():  # etudid implied
                     """<option value="%(modimpl_id)s">%(modname)s</option>\n"""
                     % {
                         "modimpl_id": modimpl["moduleimpl_id"],
-                        "modname": modimpl["module"]["code"],
+                        "modname": modimpl["module"]["code"] or "",
                     }
                 )
         menu_module += """</select></p>"""
@@ -964,10 +966,10 @@ def _tables_abs_etud(
                 ex.append(
                     f"""<a href="{url_for('notes.moduleimpl_status', 
                         scodoc_dept=g.scodoc_dept, moduleimpl_id=mod["moduleimpl_id"])}
-                        ">{mod["module"]["code"]}</a>"""
+                        ">{mod["module"]["code"] or "(module sans code)"}</a>"""
                 )
             else:
-                ex.append(mod["module"]["code"])
+                ex.append(mod["module"]["code"] or "(module sans code)")
         if ex:
             return ", ".join(ex)
         return ""
@@ -982,10 +984,10 @@ def _tables_abs_etud(
                 ex.append(
                     f"""<a href="{url_for('notes.moduleimpl_status', 
                         scodoc_dept=g.scodoc_dept, moduleimpl_id=mod["moduleimpl_id"])}
-                        ">{mod["module"]["code"]}</a>"""
+                        ">{mod["module"]["code"] or '(module sans code)'}</a>"""
                 )
             else:
-                ex.append(mod["module"]["code"])
+                ex.append(mod["module"]["code"] or "(module sans code)")
         if ex:
             return ", ".join(ex)
         return ""
diff --git a/app/scodoc/sco_bulletins.py b/app/scodoc/sco_bulletins.py
index 17195cf77..93a926b64 100644
--- a/app/scodoc/sco_bulletins.py
+++ b/app/scodoc/sco_bulletins.py
@@ -514,7 +514,7 @@ def _ue_mod_bulletin(etudid, formsemestre_id, ue_id, modimpls, nt, version):
             )
             if sco_preferences.get_preference("bul_show_codemodules", formsemestre_id):
                 mod["code"] = modimpl["module"]["code"]
-                mod["code_html"] = link_mod + mod["code"] + "</a>"
+                mod["code_html"] = link_mod + (mod["code"] or "") + "</a>"
             else:
                 mod["code"] = mod["code_html"] = ""
             mod["name"] = (
@@ -532,7 +532,7 @@ def _ue_mod_bulletin(etudid, formsemestre_id, ue_id, modimpls, nt, version):
                 % (modimpl["moduleimpl_id"], mod_descr)
             )
             if sco_preferences.get_preference("bul_show_codemodules", formsemestre_id):
-                mod["code_txt"] = modimpl["module"]["code"]
+                mod["code_txt"] = modimpl["module"]["code"] or ""
                 mod["code_html"] = link_mod + mod["code_txt"] + "</a>"
             else:
                 mod["code_txt"] = ""
diff --git a/app/scodoc/sco_bulletins_legacy.py b/app/scodoc/sco_bulletins_legacy.py
index fcc714e35..7d570d07d 100644
--- a/app/scodoc/sco_bulletins_legacy.py
+++ b/app/scodoc/sco_bulletins_legacy.py
@@ -476,8 +476,8 @@ def _bulletin_pdf_table_legacy(I, version="long"):
             else:
                 rang_minmax = mod["mod_rang_txt"]  # vide si pas option rang
             t = [
-                mod["code"],
-                mod["name"],
+                mod["code"] or "",
+                mod["name"] or "",
                 rang_minmax,
                 mod["mod_moy_txt"],
                 mod["mod_coef_txt"],
diff --git a/app/scodoc/sco_bulletins_xml.py b/app/scodoc/sco_bulletins_xml.py
index 015867e32..f41361c24 100644
--- a/app/scodoc/sco_bulletins_xml.py
+++ b/app/scodoc/sco_bulletins_xml.py
@@ -252,7 +252,7 @@ def make_xml_formsemestre_bulletinetud(
             x_mod = Element(
                 "module",
                 id=str(modimpl["moduleimpl_id"]),
-                code=str(mod["code"]),
+                code=str(mod["code"] or ""),
                 coefficient=str(mod["coefficient"]),
                 numero=str(mod["numero"]),
                 titre=scu.quote_xml_attr(mod["titre"]),
diff --git a/app/scodoc/sco_cost_formation.py b/app/scodoc/sco_cost_formation.py
index b17643d27..0cc0d78b8 100644
--- a/app/scodoc/sco_cost_formation.py
+++ b/app/scodoc/sco_cost_formation.py
@@ -65,7 +65,7 @@ def formsemestre_table_estim_cost(
         Mod = M["module"]
         T.append(
             {
-                "code": Mod["code"],
+                "code": Mod["code"] or "",
                 "titre": Mod["titre"],
                 "heures_cours": Mod["heures_cours"],
                 "heures_td": Mod["heures_td"] * n_group_td,
diff --git a/app/scodoc/sco_evaluation_check_abs.py b/app/scodoc/sco_evaluation_check_abs.py
index 36073c2e4..b8287c25d 100644
--- a/app/scodoc/sco_evaluation_check_abs.py
+++ b/app/scodoc/sco_evaluation_check_abs.py
@@ -237,7 +237,11 @@ def formsemestre_check_absences_html(formsemestre_id):
         if evals:
             H.append(
                 '<div class="module_check_absences"><h2><a href="moduleimpl_status?moduleimpl_id=%s">%s: %s</a></h2>'
-                % (M["moduleimpl_id"], M["module"]["code"], M["module"]["abbrev"])
+                % (
+                    M["moduleimpl_id"],
+                    M["module"]["code"] or "",
+                    M["module"]["abbrev"] or "",
+                )
             )
         for E in evals:
             H.append(
diff --git a/app/scodoc/sco_evaluation_edit.py b/app/scodoc/sco_evaluation_edit.py
index 5b41941cd..4375ad721 100644
--- a/app/scodoc/sco_evaluation_edit.py
+++ b/app/scodoc/sco_evaluation_edit.py
@@ -122,7 +122,7 @@ def evaluation_create_form(
     #
     mod_descr = '<a href="moduleimpl_status?moduleimpl_id=%s">%s %s</a> %s' % (
         moduleimpl_id,
-        mod["code"],
+        mod["code"] or "module sans code",
         mod["titre"],
         link,
     )
diff --git a/app/scodoc/sco_evaluations.py b/app/scodoc/sco_evaluations.py
index 72f3755cc..09f2179b7 100644
--- a/app/scodoc/sco_evaluations.py
+++ b/app/scodoc/sco_evaluations.py
@@ -637,7 +637,14 @@ def evaluation_describe(evaluation_id="", edit_in_place=True):
     )
     mod_descr = (
         '<a href="moduleimpl_status?moduleimpl_id=%s">%s %s</a> <span class="resp">(resp. <a title="%s">%s</a>)</span> %s'
-        % (moduleimpl_id, Mod["code"], Mod["titre"], nomcomplet, resp, link)
+        % (
+            moduleimpl_id,
+            Mod["code"] or "",
+            Mod["titre"] or "?",
+            nomcomplet,
+            resp,
+            link,
+        )
     )
 
     etit = E["description"] or ""
diff --git a/app/scodoc/sco_formsemestre_edit.py b/app/scodoc/sco_formsemestre_edit.py
index 619e2d078..81dbd5659 100644
--- a/app/scodoc/sco_formsemestre_edit.py
+++ b/app/scodoc/sco_formsemestre_edit.py
@@ -601,7 +601,7 @@ def do_formsemestre_createwithmodules(edit=False):
                             "input_type": "text_suggest",
                             "size": 50,
                             "withcheckbox": True,
-                            "title": "%s %s" % (mod["code"], mod["titre"]),
+                            "title": "%s %s" % (mod["code"] or "", mod["titre"] or ""),
                             "allowed_values": allowed_user_names,
                             "template": itemtemplate,
                             "text_suggest_options": {
@@ -802,7 +802,9 @@ def do_formsemestre_createwithmodules(edit=False):
                 }
                 moduleimpl_id = sco_moduleimpl.do_moduleimpl_create(modargs)
                 mod = sco_edit_module.module_list({"module_id": module_id})[0]
-                msg += ["création de %s (%s)" % (mod["code"], mod["titre"])]
+                msg += [
+                    "création de %s (%s)" % (mod["code"] or "?", mod["titre"] or "?")
+                ]
                 # INSCRIPTIONS DES ETUDIANTS
                 log(
                     'inscription module: %s = "%s"'
@@ -824,7 +826,7 @@ def do_formsemestre_createwithmodules(edit=False):
                     )
                     msg += [
                         "inscription de %d étudiants au module %s"
-                        % (len(etudids), mod["code"])
+                        % (len(etudids), mod["code"] or "(module sans code)")
                     ]
                 else:
                     log(
@@ -919,11 +921,19 @@ def formsemestre_delete_moduleimpls(formsemestre_id, module_ids_to_del):
         if evals:
             msg += [
                 '<b>impossible de supprimer %s (%s) car il y a %d évaluations définies (<a href="moduleimpl_status?moduleimpl_id=%s" class="stdlink">supprimer les d\'abord</a>)</b>'
-                % (mod["code"], mod["titre"], len(evals), moduleimpl_id)
+                % (
+                    mod["code"] or "(module sans code)",
+                    mod["titre"],
+                    len(evals),
+                    moduleimpl_id,
+                )
             ]
             ok = False
         else:
-            msg += ["suppression de %s (%s)" % (mod["code"], mod["titre"])]
+            msg += [
+                "suppression de %s (%s)"
+                % (mod["code"] or "(module sans code)", mod["titre"] or "")
+            ]
             sco_moduleimpl.do_moduleimpl_delete(
                 moduleimpl_id, formsemestre_id=formsemestre_id
             )
diff --git a/app/scodoc/sco_formsemestre_inscriptions.py b/app/scodoc/sco_formsemestre_inscriptions.py
index 3e398c837..44c75dd0c 100644
--- a/app/scodoc/sco_formsemestre_inscriptions.py
+++ b/app/scodoc/sco_formsemestre_inscriptions.py
@@ -508,7 +508,7 @@ def formsemestre_inscription_option(etudid, formsemestre_id):
         modimpls_by_ue_ids[ue_id].append(mod["moduleimpl_id"])
 
         modimpls_by_ue_names[ue_id].append(
-            "%s %s" % (mod["module"]["code"], mod["module"]["titre"])
+            "%s %s" % (mod["module"]["code"] or "", mod["module"]["titre"] or "")
         )
         vals = scu.get_request_args()
         if not vals.get("tf_submitted", False):
@@ -653,7 +653,7 @@ function chkbx_select(field_id, state) {
                         "%s (%s)"
                         % (
                             modsdict[x]["module"]["titre"],
-                            modsdict[x]["module"]["code"],
+                            modsdict[x]["module"]["code"] or "(module sans code)",
                         )
                         for x in a_desinscrire
                     ]
@@ -672,7 +672,7 @@ function chkbx_select(field_id, state) {
                         "%s (%s)"
                         % (
                             modsdict[x]["module"]["titre"],
-                            modsdict[x]["module"]["code"],
+                            modsdict[x]["module"]["code"] or "(module sans code)",
                         )
                         for x in a_inscrire
                     ]
diff --git a/app/scodoc/sco_formsemestre_status.py b/app/scodoc/sco_formsemestre_status.py
index e9a69c8c4..d8be56f27 100644
--- a/app/scodoc/sco_formsemestre_status.py
+++ b/app/scodoc/sco_formsemestre_status.py
@@ -638,7 +638,7 @@ def formsemestre_description_table(formsemestre_id, with_evals=False):
         )
         l = {
             "UE": M["ue"]["acronyme"],
-            "Code": M["module"]["code"],
+            "Code": M["module"]["code"] or "",
             "Module": M["module"]["abbrev"] or M["module"]["titre"],
             "_Module_class": "scotext",
             "Inscrits": len(ModInscrits),
diff --git a/app/scodoc/sco_moduleimpl_inscriptions.py b/app/scodoc/sco_moduleimpl_inscriptions.py
index a0266219f..e3c232305 100644
--- a/app/scodoc/sco_moduleimpl_inscriptions.py
+++ b/app/scodoc/sco_moduleimpl_inscriptions.py
@@ -92,7 +92,11 @@ def moduleimpl_inscriptions_edit(moduleimpl_id, etuds=[], submitted=False):
     "Appliquer les modifications".
     </p>
     """
-        % (moduleimpl_id, mod["titre"], mod["code"]),
+        % (
+            moduleimpl_id,
+            mod["titre"] or "(module sans titre)",
+            mod["code"] or "(module sans code)",
+        ),
     ]
     # Liste des inscrits à ce semestre
     inscrits = sco_formsemestre_inscriptions.do_formsemestre_inscription_listinscrits(
@@ -308,8 +312,8 @@ def moduleimpl_inscriptions_stats(formsemestre_id):
             H.append(
                 '<tr class="formsemestre_status"><td>%s</td><td class="formsemestre_status_code">%s</td><td class="formsemestre_status_inscrits">%s</td><td>%s</td></tr>'
                 % (
-                    mod["ue"]["acronyme"],
-                    mod["module"]["code"],
+                    mod["ue"]["acronyme"] or "",
+                    mod["module"]["code"] or "(module sans code)",
                     mod["nb_inscrits"],
                     c_link,
                 )
@@ -337,7 +341,11 @@ def moduleimpl_inscriptions_stats(formsemestre_id):
                 c_link = mod["module"]["titre"]
             H.append(
                 '<tr class="formsemestre_status_green"><td>%s</td><td class="formsemestre_status_code">%s</td><td>%s</td></tr>'
-                % (mod["ue"]["acronyme"], mod["module"]["code"], c_link)
+                % (
+                    mod["ue"]["acronyme"],
+                    mod["module"]["code"] or "(module sans code)",
+                    c_link,
+                )
             )
         H.append("</table>")
 
diff --git a/app/scodoc/sco_placement.py b/app/scodoc/sco_placement.py
index 1d5ac6c42..7682d1ea4 100644
--- a/app/scodoc/sco_placement.py
+++ b/app/scodoc/sco_placement.py
@@ -257,7 +257,7 @@ class PlacementRunner:
             self.moduleimpl_data["formsemestre_id"]
         )
         self.evalname = "%s-%s" % (
-            self.module_data["code"],
+            self.module_data["code"] or "?",
             ndb.DateDMYtoISO(self.eval_data["jour"]),
         )
         if self.eval_data["description"]:
@@ -266,7 +266,8 @@ class PlacementRunner:
             self.evaltitre = "évaluation du %s" % self.eval_data["jour"]
         self.desceval = [  # une liste de chaines: description de l'evaluation
             "%s" % self.sem["titreannee"],
-            "Module : %s - %s" % (self.module_data["code"], self.module_data["abbrev"]),
+            "Module : %s - %s"
+            % (self.module_data["code"] or "?", self.module_data["abbrev"] or ""),
             "Surveillants : %s" % self.surveillants,
             "Batiment : %(batiment)s - Salle : %(salle)s" % self.__dict__,
             "Controle : %s (coef. %g)"
diff --git a/app/scodoc/sco_poursuite_dut.py b/app/scodoc/sco_poursuite_dut.py
index c0c453bf9..cfa3dff8c 100644
--- a/app/scodoc/sco_poursuite_dut.py
+++ b/app/scodoc/sco_poursuite_dut.py
@@ -92,7 +92,7 @@ def etud_get_poursuite_info(sem, etud):
                 for ue in ues:  # on parcourt chaque UE
                     for modimpl in modimpls:  # dans chaque UE les modules
                         if modimpl["module"]["ue_id"] == ue["ue_id"]:
-                            codeModule = modimpl["module"]["code"]
+                            codeModule = modimpl["module"]["code"] or ""
                             noteModule = scu.fmt_note(
                                 nt.get_etud_mod_moy(modimpl["moduleimpl_id"], etudid)
                             )
diff --git a/app/scodoc/sco_saisie_notes.py b/app/scodoc/sco_saisie_notes.py
index b026bbaa4..8dee1a7e2 100644
--- a/app/scodoc/sco_saisie_notes.py
+++ b/app/scodoc/sco_saisie_notes.py
@@ -813,8 +813,8 @@ def feuille_saisie_notes(evaluation_id, group_ids=[]):
         evaltitre = "évaluation du %s" % E["jour"]
     description = "%s en %s (%s) resp. %s" % (
         evaltitre,
-        Mod["abbrev"],
-        Mod["code"],
+        Mod["abbrev"] or "",
+        Mod["code"] or "",
         mod_responsable["prenomnom"],
     )
 
diff --git a/app/views/absences.py b/app/views/absences.py
index ea65d52ee..cf8de2c18 100644
--- a/app/views/absences.py
+++ b/app/views/absences.py
@@ -443,8 +443,9 @@ def SignaleAbsenceGrHebdo(
             % {
                 "modimpl_id": modimpl["moduleimpl_id"],
                 "modname": modimpl["module"]["code"]
+                or ""
                 + " "
-                + (modimpl["module"]["abbrev"] or modimpl["module"]["titre"]),
+                + (modimpl["module"]["abbrev"] or modimpl["module"]["titre"] or ""),
                 "sel": sel,
             }
         )
@@ -611,6 +612,7 @@ def SignaleAbsenceGrSemestre(
                 % {
                     "modimpl_id": modimpl["moduleimpl_id"],
                     "modname": modimpl["module"]["code"]
+                    or ""
                     + " "
                     + (modimpl["module"]["abbrev"] or modimpl["module"]["titre"]),
                     "sel": sel,
diff --git a/app/views/notes.py b/app/views/notes.py
index a1424b381..efad2808b 100644
--- a/app/views/notes.py
+++ b/app/views/notes.py
@@ -1322,7 +1322,7 @@ def formsemestre_enseignants_list(formsemestre_id, format="html"):
     # description textuelle des modules
     for ens in sem_ens:
         sem_ens[ens]["descr_mods"] = ", ".join(
-            [x["module"]["code"] for x in sem_ens[ens]["mods"]]
+            [x["module"]["code"] or "?" for x in sem_ens[ens]["mods"]]
         )
 
     # ajoute infos sur enseignant: