From e43d64c173ace513c5c5cc359622de069d2c4379 Mon Sep 17 00:00:00 2001
From: Alan Coleman <alanc@udel.edu>
Date: Wed, 6 Mar 2024 15:49:32 +0100
Subject: [PATCH] Fix overwriting of primary writer by startOfLibrary command

---
 examples/cascade_examples/em_shower.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/examples/cascade_examples/em_shower.cpp b/examples/cascade_examples/em_shower.cpp
index 138717edc..dace6696d 100644
--- a/examples/cascade_examples/em_shower.cpp
+++ b/examples/cascade_examples/em_shower.cpp
@@ -181,6 +181,8 @@ int main(int argc, char** argv) {
   auto sequence = make_sequence(emCascade, emContinuous, longprof, observationLevel, cut);
   // define air shower object, run simulation
   TrackingType tracking;
+  
+  output.startOfLibrary();
 
   output.startOfLibrary();
 
-- 
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