diff --git a/DDG4/src/Geant4CalorimeterSD.cpp b/DDG4/src/Geant4CalorimeterSD.cpp
index ab69cff5b5af5afd4d90770405ac1558bca04697..a769bc85dd9c18e00d1c91f94af182b842112568 100644
--- a/DDG4/src/Geant4CalorimeterSD.cpp
+++ b/DDG4/src/Geant4CalorimeterSD.cpp
@@ -34,7 +34,7 @@ namespace DD4hep {  namespace Simulation {
     HitContribution contrib = Geant4Hit::extractContribution(step);
     Geant4CalorimeterHit* hit=find(collection(0),HitPositionCompare<Geant4CalorimeterHit>(pos));
 
-    G4cout << "----------- Geant4GenericSD<Calorimeter>::buildHits : position : " << pos << G4endl ;
+    //    G4cout << "----------- Geant4GenericSD<Calorimeter>::buildHits : position : " << pos << G4endl ;
 
     if ( !hit ) {
 
diff --git a/DDG4/src/Geant4TrackerSD.cpp b/DDG4/src/Geant4TrackerSD.cpp
index a1032aa7b991c5ca6b5c76fc43d17df46b9d3f99..02abee5c03fe75274c5f80450c2cac4b75b86ea4 100644
--- a/DDG4/src/Geant4TrackerSD.cpp
+++ b/DDG4/src/Geant4TrackerSD.cpp
@@ -36,7 +36,7 @@ namespace DD4hep {  namespace Simulation {
 	direction *= new_len/hit_len;
       }
       
-      G4cout << "----------- Geant4GenericSD<Tracker>::buildHits : position : " << prePos << G4endl ;
+      //      G4cout << "----------- Geant4GenericSD<Tracker>::buildHits : position : " << prePos << G4endl ;
       
       Geant4TrackerHit* hit = 
 	new Geant4TrackerHit(h.track->GetTrackID(),