From 64f9566ec7d93bea839c0feeefbc78c576646f52 Mon Sep 17 00:00:00 2001
From: Andre Sailer <andre.philippe.sailer@cern.ch>
Date: Wed, 4 Dec 2024 15:22:52 +0100
Subject: [PATCH] Geant4AssemblyVolume: use the same copy ID for the Geant4
 Volume as was set in DD4hep geometry construction

---
 DDG4/src/Geant4AssemblyVolume.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/DDG4/src/Geant4AssemblyVolume.cpp b/DDG4/src/Geant4AssemblyVolume.cpp
index 331c6aeb0..91bb1883e 100644
--- a/DDG4/src/Geant4AssemblyVolume.cpp
+++ b/DDG4/src/Geant4AssemblyVolume.cpp
@@ -141,7 +141,7 @@ void Geant4AssemblyVolume::imprint(const Geant4Converter& cnv,
                                                   triplet.GetVolume(),
                                                   pMotherLV,
                                                   false,
-                                                  numberOfDaughters + i,
+                                                  node->GetNumber(),
                                                   surfCheck );
 
       info.g4VolumeImprints[vol].emplace_back(new_chain,pvPlaced.first);