diff --git a/DotUML/Diagramme_cas/diagramme_sequence/miseàjour/misesàjour b/DotUML/Diagramme_cas/diagramme_sequence/miseàjour/misesàjour
index 4ce0329..3829dd0 100644
--- a/DotUML/Diagramme_cas/diagramme_sequence/miseàjour/misesàjour
+++ b/DotUML/Diagramme_cas/diagramme_sequence/miseàjour/misesàjour
@@ -15,6 +15,26 @@ activate web
   web --> Source "données reçues"
 
 
+deactivate Source
+deactivate web
+}
+SequenceDiagram [frame=true framecolor=steelblue label="event_introuvable"] {
+ actor "Source de données tierces" as Source
+actor "OnlineBet" as web
+actor "Événement" as Event
+
+activate Source
+
+
+  Source --> web "metàjour(12,0,1)"
+activate web
+
+  activate Event
+  
+  deactivate Event
+  web --> Source "erreur(Evènement introuvable)"
+
+
 deactivate Source
 deactivate web
 }