diff --git a/app/models/preferences.py b/app/models/preferences.py
index b04ad0da..59c82ec8 100644
--- a/app/models/preferences.py
+++ b/app/models/preferences.py
@@ -4,6 +4,7 @@
 """
 from app import db, log
 from app.scodoc import bonus_sport
+from app.scodoc.sco_exceptions import ScoValueError
 
 
 class ScoPreference(db.Model):
@@ -94,7 +95,7 @@ class ScoDocSiteConfig(db.Model):
         """returns bonus func with specified name.
         If name not specified, return the configured function.
         None if no bonus function configured.
-        Raises NameError if func_name not found in module bonus_sport.
+        Raises ScoValueError if func_name not found in module bonus_sport.
         """
         if func_name is None:
             c = ScoDocSiteConfig.query.filter_by(name=cls.BONUS_SPORT).first()
@@ -103,7 +104,13 @@ class ScoDocSiteConfig(db.Model):
             func_name = c.value
         if func_name == "":  # pas de bonus défini
             return None
-        return getattr(bonus_sport, func_name)
+        try:
+            return getattr(bonus_sport, func_name)
+        except AttributeError:
+            raise ScoValueError(
+                f"""Fonction de calcul maison inexistante: {func_name}. 
+                (contacter votre administrateur local)."""
+            )
 
     @classmethod
     def get_bonus_sport_func_names(cls):
diff --git a/app/scodoc/sco_inscr_passage.py b/app/scodoc/sco_inscr_passage.py
index cc917284..2f952cb8 100644
--- a/app/scodoc/sco_inscr_passage.py
+++ b/app/scodoc/sco_inscr_passage.py
@@ -288,10 +288,11 @@ def formsemestre_inscr_passage(
     footer = html_sco_header.sco_footer()
     H = [header]
     if isinstance(etuds, str):
-        etuds = etuds.split(",")  # vient du form de confirmation
+        # list de strings, vient du form de confirmation
+        etuds = [int(x) for x in etuds.split(",") if x]
     elif isinstance(etuds, int):
         etuds = [etuds]
-    etuds = [int(x) for x in etuds]
+
     auth_etuds_by_sem, inscrits, candidats = list_authorized_etuds_by_sem(sem)
     etuds_set = set(etuds)
     candidats_set = set(candidats)
diff --git a/app/scodoc/sco_undo_notes.py b/app/scodoc/sco_undo_notes.py
index f49e75d1..4231f81e 100644
--- a/app/scodoc/sco_undo_notes.py
+++ b/app/scodoc/sco_undo_notes.py
@@ -176,7 +176,7 @@ def formsemestre_list_saisies_notes(formsemestre_id, format="html"):
     """Table listant toutes les opérations de saisies de notes, dans toutes
     les évaluations du semestre.
     """
-    sem = sco_formsemestre.get_formsemestre(formsemestre_id)
+    sem = sco_formsemestre.get_formsemestre(formsemestre_id, raise_soft_exc=True)
     r = ndb.SimpleDictFetch(
         """SELECT i.nom, code_nip, n.*, mod.titre, e.description, e.jour
         FROM notes_notes n, notes_evaluation e, notes_moduleimpl mi,
diff --git a/app/views/notes.py b/app/views/notes.py
index 5214977e..6957d682 100644
--- a/app/views/notes.py
+++ b/app/views/notes.py
@@ -1565,7 +1565,7 @@ def evaluation_delete(evaluation_id):
     """Form delete evaluation"""
     El = sco_evaluations.do_evaluation_list(args={"evaluation_id": evaluation_id})
     if not El:
-        raise ValueError("Evalution inexistante ! (%s)" % evaluation_id)
+        raise ScoValueError("Evalution inexistante ! (%s)" % evaluation_id)
     E = El[0]
     M = sco_moduleimpl.moduleimpl_list(moduleimpl_id=E["moduleimpl_id"])[0]
     Mod = sco_edit_module.module_list(args={"module_id": M["module_id"]})[0]