diff --git a/app/scodoc/sco_exceptions.py b/app/scodoc/sco_exceptions.py
index d975766e..dd872a7a 100644
--- a/app/scodoc/sco_exceptions.py
+++ b/app/scodoc/sco_exceptions.py
@@ -36,11 +36,6 @@ class ScoException(Exception):
     pass
 
 
-class NoteProcessError(ScoException):
-    "misc errors in process"
-    pass
-
-
 class InvalidEtudId(NoteProcessError):
     pass
 
@@ -56,6 +51,11 @@ class ScoValueError(ScoException):
         self.dest_url = dest_url
 
 
+class NoteProcessError(ScoValueError):
+    "Valeurs notes invalides"
+    pass
+
+
 class ScoFormatError(ScoValueError):
     pass
 
diff --git a/app/scodoc/sco_saisie_notes.py b/app/scodoc/sco_saisie_notes.py
index 0fa105db..d0a5407d 100644
--- a/app/scodoc/sco_saisie_notes.py
+++ b/app/scodoc/sco_saisie_notes.py
@@ -487,10 +487,10 @@ def notes_add(
     }
     for (etudid, value) in notes:
         if check_inscription and (etudid not in inscrits):
-            raise NoteProcessError("etudiant non inscrit dans ce module")
-        if not ((value is None) or (type(value) == type(1.0))):
+            raise NoteProcessError(f"etudiant {etudid} non inscrit dans ce module")
+        if (value is not None) and not isinstance(value, float):
             raise NoteProcessError(
-                "etudiant %s: valeur de note invalide (%s)" % (etudid, value)
+                f"etudiant {etudid}: valeur de note invalide ({value})"
             )
     # Recherche notes existantes
     notes_db = sco_evaluation_db.do_evaluation_get_all_notes(evaluation_id)
diff --git a/sco_version.py b/sco_version.py
index cab845d1..23676c26 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.1.25"
+SCOVERSION = "9.1.26"
 
 SCONAME = "ScoDoc"