diff --git a/app/scodoc/TrivialFormulator.py b/app/scodoc/TrivialFormulator.py
index f3c768a2d..0c7e37622 100644
--- a/app/scodoc/TrivialFormulator.py
+++ b/app/scodoc/TrivialFormulator.py
@@ -370,12 +370,23 @@ class TF(object):
                     self.values[field] = True
                 else:
                     self.values[field] = False
-                # open('/tmp/toto','a').write('checkvalues: val=%s (%s) values[%s] = %s\n' % (val, type(val), field, self.values[field]))
             if descr.get("convert_numbers", False):
                 if typ[:3] == "int":
-                    self.values[field] = int(self.values[field])
+                    try:
+                        self.values[field] = int(self.values[field])
+                    except ValueError:
+                        msg.append(
+                            f"valeur invalide ({self.values[field]}) pour le champs {field}"
+                        )
+                        ok = False
                 elif typ == "float" or typ == "real":
-                    self.values[field] = float(self.values[field].replace(",", "."))
+                    try:
+                        self.values[field] = float(self.values[field].replace(",", "."))
+                    except ValueError:
+                        msg.append(
+                            f"valeur invalide ({self.values[field]}) pour le champs {field}"
+                        )
+                        ok = False
         if ok:
             self.result = self.values
         else:
diff --git a/sco_version.py b/sco_version.py
index 63669db8c..6fe40c050 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.4.46"
+SCOVERSION = "9.4.47"
 
 SCONAME = "ScoDoc"