diff --git a/app/but/bulletin_but_court.py b/app/but/bulletin_but_court.py
index 3997d091..922e26de 100644
--- a/app/but/bulletin_but_court.py
+++ b/app/but/bulletin_but_court.py
@@ -72,9 +72,11 @@ def bulletin_but(formsemestre_id: int, etudid: int = None, fmt="html"):
         bul: dict = bulletins_sem.bulletin_etud(etud)
     decision_ues = (
         {x["acronyme"]: x for x in bul["semestre"]["decision_ue"]}
-        if "semestre" in bul
+        if "semestre" in bul and "decision_ue" in bul["semestre"]
         else {}
     )
+    if not "ues" in bul:
+        raise ScoValueError("Aucune UE à afficher")
     cursus = cursus_but.EtudCursusBUT(etud, formsemestre.formation)
     refcomp = formsemestre.formation.referentiel_competence
     if refcomp is None: