diff --git a/DDCore/src/Printout.cpp b/DDCore/src/Printout.cpp
index 071b5138b31175d9b6e8f3385254dea912c1a2ee..59ce77b5d0d5f1bc97efedc533a4988cefe918f0 100644
--- a/DDCore/src/Printout.cpp
+++ b/DDCore/src/Printout.cpp
@@ -326,6 +326,7 @@ DD4hep::PrintLevel DD4hep::printLevel(const char* value)  {
   if ( strcmp(value,"6")       == 0 ) return DD4hep::FATAL;
   if ( strcmp(value,"7")       == 0 ) return DD4hep::ALWAYS;
   except("Printout","Unknown printlevel requested:%s",value);
+  return DD4hep::ALWAYS;
 }
 
 /// Translate the printer level from string to value
diff --git a/DDG4/include/DDG4/Geant4EventAction.h b/DDG4/include/DDG4/Geant4EventAction.h
index 9788587a00f59d7c2c929413be8eb99489f1f5a2..b651e34ecaf148c760c1aaf4d3b1ad338af895ba 100644
--- a/DDG4/include/DDG4/Geant4EventAction.h
+++ b/DDG4/include/DDG4/Geant4EventAction.h
@@ -54,8 +54,6 @@ namespace DD4hep {
     public:
       typedef Geant4SharedEventAction shared_type;
     public:
-      /// Inhibit default constructor
-      Geant4EventAction() = delete;
       /// Inhibit copy constructor
       Geant4EventAction(const Geant4EventAction& copy) = delete;
       /// Standard constructor
@@ -86,8 +84,6 @@ namespace DD4hep {
       /// Reference to the shared action
       Geant4EventAction* m_action;
     public:
-      /// Inhibit default constructor
-      Geant4SharedEventAction() = delete;
       /// Inhibit copy constructor
       Geant4SharedEventAction(const Geant4SharedEventAction& copy) = delete;
       /// Standard constructor
@@ -131,8 +127,6 @@ namespace DD4hep {
       Actors<Geant4EventAction> m_actors;
 
     public:
-      /// Inhibit default constructor
-      Geant4EventActionSequence() = delete;
       /// Inhibit copy constructor
       Geant4EventActionSequence(const Geant4EventActionSequence& copy) = delete;
       /// Standard constructor
diff --git a/DDG4/include/DDG4/Geant4Primary.h b/DDG4/include/DDG4/Geant4Primary.h
index 549fd9556794267e0d8a940b31c415e779dd9d32..162e42ea64573b0b146e2a41b75a22ec10a0b0c1 100644
--- a/DDG4/include/DDG4/Geant4Primary.h
+++ b/DDG4/include/DDG4/Geant4Primary.h
@@ -96,9 +96,9 @@ namespace DD4hep {
     class Geant4PrimaryInteraction   {
     private:
       /// Copy constructor
-      Geant4PrimaryInteraction(const Geant4PrimaryInteraction& c);
+      Geant4PrimaryInteraction(const Geant4PrimaryInteraction& c) = delete;
       /// Assignment operator
-      Geant4PrimaryInteraction& operator=(const Geant4PrimaryInteraction& c);
+      Geant4PrimaryInteraction& operator=(const Geant4PrimaryInteraction& c) = delete;
 
     public:
       typedef Geant4Particle                    Particle;
@@ -114,15 +114,15 @@ namespace DD4hep {
       /// User data extension if required
       ExtensionHandle extension;
       /// User mask to flag the interaction. Also unique identifier
-      int             mask;
+      int             mask = 0;
       /// Flag that the event is locked for G4 native generators
-      int             locked;
+      int             locked = 0;
       /// Next PID indentifier
-      int             next_particle_identifier;
+      int             next_particle_identifier = -1;
       
     public:
       /// Default constructor
-      Geant4PrimaryInteraction();
+      Geant4PrimaryInteraction() = default;
       /// Default destructor
       virtual ~Geant4PrimaryInteraction();
       /// Access a new particle identifier within the interaction
diff --git a/DDG4/include/DDG4/Geant4SensDetAction.h b/DDG4/include/DDG4/Geant4SensDetAction.h
index ad0f82d44281a44c62748977749d274bbc97c7bc..6bbcd9e7ee05d13e7d518b4465f6715d7e0ff035 100644
--- a/DDG4/include/DDG4/Geant4SensDetAction.h
+++ b/DDG4/include/DDG4/Geant4SensDetAction.h
@@ -93,8 +93,6 @@ namespace DD4hep {
      */
     class Geant4Filter: public Geant4Action {
     public:
-      /// Inhibit default constructor
-      Geant4Filter() = delete;
       /// Inhibit copy constructor
       Geant4Filter(const Geant4Filter& copy) = delete;
       /// Standard constructor
@@ -152,9 +150,6 @@ namespace DD4hep {
       Actors<Geant4Filter> m_filters;
 
     public:
-      /// Inhibit default constructor
-      Geant4Sensitive() = delete;
-
       /// Inhibit copy constructor
       Geant4Sensitive(const Geant4Sensitive& copy) = delete;
 
@@ -328,9 +323,6 @@ namespace DD4hep {
       }
 
     public:
-      /// Inhibit default constructor
-      Geant4SensDetActionSequence() = delete;
-
       /// Inhibit copy constructor
       Geant4SensDetActionSequence(const Geant4SensDetActionSequence& copy) = delete;
 
@@ -361,10 +353,13 @@ namespace DD4hep {
 
       /// Access HitCollection container names
       const std::string& hitCollectionName(size_t which) const;
+
       /// Retrieve the hits collection associated with this detector by its serial number
       Geant4HitCollection* collection(size_t which) const;
+
       /// Retrieve the hits collection associated with this detector by its collection identifier
       Geant4HitCollection* collectionByID(size_t id) const;
+
       /// Register begin-of-event callback
       template <typename T> void callAtBegin(T* p, void (T::*f)(G4HCofThisEvent*)) {
         m_begin.add(p, f);
diff --git a/DDG4/include/DDG4/Geant4SensDetAction.inl b/DDG4/include/DDG4/Geant4SensDetAction.inl
index cb78c8ac96b0213e140c5f0ee19d2c61c2dca1f9..57c9d516c076c92e85882431624a69862e4eb1d8 100644
--- a/DDG4/include/DDG4/Geant4SensDetAction.inl
+++ b/DDG4/include/DDG4/Geant4SensDetAction.inl
@@ -1,4 +1,3 @@
-// $Id: $
 //==========================================================================
 //  AIDA Detector description implementation for LCD
 //--------------------------------------------------------------------------
diff --git a/DDG4/include/DDG4/Geant4SteppingAction.h b/DDG4/include/DDG4/Geant4SteppingAction.h
index e33778e6a33c4e37c491bfd2b9bd6d5a02dcd744..d4e7ecf1d9ae97f12ddc4a4ab9ab30f8e00dd920 100644
--- a/DDG4/include/DDG4/Geant4SteppingAction.h
+++ b/DDG4/include/DDG4/Geant4SteppingAction.h
@@ -41,8 +41,8 @@ namespace DD4hep {
     public:
       typedef Geant4SharedSteppingAction shared_type;
     public:
-      /// Inhibit default constructor
-      Geant4SteppingAction() = delete;
+      /// Inhibit copy constructor
+      Geant4SteppingAction(const Geant4SteppingAction& copy) = delete;
       /// Standard constructor
       Geant4SteppingAction(Geant4Context* context, const std::string& name);
       /// Default destructor
@@ -69,6 +69,8 @@ namespace DD4hep {
       /// Reference to the shared action
       Geant4SteppingAction* m_action;
     public:
+      /// Inhibit copy constructor
+      Geant4SharedSteppingAction(const Geant4SteppingAction& copy) = delete;
       /// Standard constructor
       Geant4SharedSteppingAction(Geant4Context* context, const std::string& nam);
       /// Default destructor
@@ -104,6 +106,8 @@ namespace DD4hep {
       Actors<Geant4SteppingAction> m_actors;
 
     public:
+      /// Inhibit copy constructor
+      Geant4SteppingActionSequence(const Geant4SteppingAction& copy) = delete;
       /// Standard constructor
       Geant4SteppingActionSequence(Geant4Context* context, const std::string& name);
       /// Default destructor
diff --git a/DDG4/include/DDG4/Geant4TrackingAction.h b/DDG4/include/DDG4/Geant4TrackingAction.h
index 2537b33da62f881869388f0922c8e532ddf4f9c2..c688bb901dd6fffb7d1b9c9d3b4c3ab9c0c1d0ec 100644
--- a/DDG4/include/DDG4/Geant4TrackingAction.h
+++ b/DDG4/include/DDG4/Geant4TrackingAction.h
@@ -43,6 +43,8 @@ namespace DD4hep {
     public:
       typedef Geant4SharedTrackingAction shared_type;
     public:
+      /// Inhibit copy constructor
+      Geant4TrackingAction(const Geant4TrackingAction& copy) = delete;
       /// Standard constructor
       Geant4TrackingAction(Geant4Context* context, const std::string& name = "");
       /// Default destructor
@@ -77,6 +79,8 @@ namespace DD4hep {
       /// Reference to the shared action
       Geant4TrackingAction* m_action;
     public:
+      /// Inhibit copy constructor
+      Geant4SharedTrackingAction(const Geant4TrackingAction& copy) = delete;
       /// Standard constructor
       Geant4SharedTrackingAction(Geant4Context* context, const std::string& nam);
       /// Default destructor
@@ -119,6 +123,8 @@ namespace DD4hep {
       /// The list of action objects to be called
       Actors<Geant4TrackingAction> m_actors;
     public:
+      /// Inhibit copy constructor
+      Geant4TrackingActionSequence(const Geant4TrackingAction& copy) = delete;
       /// Standard constructor
       Geant4TrackingActionSequence(Geant4Context* context, const std::string& name);
       /// Default destructor
@@ -163,5 +169,4 @@ namespace DD4hep {
 
   }    // End namespace Simulation
 }      // End namespace DD4hep
-
 #endif // DD4HEP_DDG4_GEANT4TRACKINGACTION_H
diff --git a/DDG4/src/Geant4Primary.cpp b/DDG4/src/Geant4Primary.cpp
index c486eba0729483c8a9ed898f3a18dedf458e4bb1..64743bbbace1de2d91fbcdcbbb42f7ad93006cc9 100644
--- a/DDG4/src/Geant4Primary.cpp
+++ b/DDG4/src/Geant4Primary.cpp
@@ -53,24 +53,6 @@ const Geant4Particle* Geant4PrimaryMap::get(const G4PrimaryParticle* particle) c
   return i != m_primaryMap.end() ? (*i).second : 0;
 }
 
-/// Default constructor
-Geant4PrimaryInteraction::Geant4PrimaryInteraction()
-  : mask(0), locked(0), next_particle_identifier(-1)
-{
-}
-
-/// Copy constructor
-Geant4PrimaryInteraction::Geant4PrimaryInteraction(const Geant4PrimaryInteraction&)
-  : mask(0), locked(0), next_particle_identifier(-1)
-{
-}
-
-/// Assignment operator
-Geant4PrimaryInteraction& Geant4PrimaryInteraction::operator=(const Geant4PrimaryInteraction& c)  {
-  if ( &c == this ) {}
-  return *this;
-}
-
 /// Default destructor
 Geant4PrimaryInteraction::~Geant4PrimaryInteraction()   {
   releaseObjects(vertices);