From 6277447c640a6d63c73d9a44ae390648554dd983 Mon Sep 17 00:00:00 2001
From: Manuel Huber <info@manuelhu.de>
Date: Wed, 27 Nov 2024 09:56:47 +0100
Subject: [PATCH] RMGSteppingAction: only output parameters on master

---
 src/RMGSteppingAction.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/RMGSteppingAction.cc b/src/RMGSteppingAction.cc
index a54444e9..ae66a8f4 100644
--- a/src/RMGSteppingAction.cc
+++ b/src/RMGSteppingAction.cc
@@ -18,6 +18,7 @@
 #include "G4GenericMessenger.hh"
 #include "G4Ions.hh"
 #include "G4Step.hh"
+#include "G4Threading.hh"
 
 #include "RMGEventAction.hh"
 #include "RMGLog.hh"
@@ -59,7 +60,7 @@ void RMGSteppingAction::UserSteppingAction(const G4Step* step) {
 void RMGSteppingAction::SetDaughterKillLifetime(double max_lifetime) {
 
   fDaughterKillLifetime = max_lifetime;
-  if (fDaughterKillLifetime > 0) {
+  if (fDaughterKillLifetime > 0 && G4Threading::IsMasterThread()) {
     RMGLog::OutFormat(RMGLog::summary,
         "Enabled killing of daughter nuclei with a lifetime longer than {} us.",
         fDaughterKillLifetime / CLHEP::us);