diff --git a/PotentialFlow/magnus.pro b/PotentialFlow/magnus.pro
index d34d6cd27dcb2681f7f3375562a6d0898c63c96f..83190765002e959a3799bb15c79b277631ebb60b 100644
--- a/PotentialFlow/magnus.pro
+++ b/PotentialFlow/magnus.pro
@@ -242,6 +242,7 @@ Resolution{
       If( Flag_Circ || ( Flag_Object == 0 ) )
 
         Generate[A]; Solve[A]; SaveSolution[A];
+        PostOperation[Trailing];
 
       Else
 	// A resolution can contain elementary algorithms.