diff --git a/src/Solver/Mage.py b/src/Solver/Mage.py
index f3a7eb124bff653178c5f3256bba2c75c152278e..82ec798ae6b4230c50003d2f788a16f68993e470 100644
--- a/src/Solver/Mage.py
+++ b/src/Solver/Mage.py
@@ -322,6 +322,9 @@ class Mage(CommandLineSolver):
 
     @timer
     def _export_LC(self, study, lateral, f, qlog, name="0"):
+        if lateral.edge is None:
+            return
+
         edges = study.river.enable_edges()
         if lateral.edge not in edges:
             return