diff --git a/DDDigi/src/DigiStoreDump.cpp b/DDDigi/src/DigiStoreDump.cpp
index 84ab134c1e9ee0b8e604302295aeab20b0e2ddf8..d3144fae47889e4fe49274a8559f931a10455c7a 100644
--- a/DDDigi/src/DigiStoreDump.cpp
+++ b/DDDigi/src/DigiStoreDump.cpp
@@ -216,12 +216,12 @@ DigiStoreDump::dump_history(DigiContext& context, Key container_key, const T& co
 }
 
 std::vector<std::string>
-DigiStoreDump::dump_deposit_history(DigiContext& context, Key container_key, const DepositMapping& container)  const {
-  std::size_t count = 0;
+DigiStoreDump::dump_deposit_history(DigiContext& /*context*/, Key container_key, const DepositMapping& container)  const {
   std::vector<std::string> records;
   auto line = format("|----  %s", data_header(container_key, "deposits", container).c_str());
   records.emplace_back(line);
 #ifdef DDDIGI_INPLACE_HISTORY
+  std::size_t count = 0;
   for( const auto& item : container )   {
     auto rec = dump_history(context, container_key, item, count++);
     records.insert(records.end(), rec.begin(), rec.end());
@@ -231,12 +231,12 @@ DigiStoreDump::dump_deposit_history(DigiContext& context, Key container_key, con
 }
 
 std::vector<std::string>
-DigiStoreDump::dump_deposit_history(DigiContext& context, Key container_key, const DepositVector& container)  const {
-  std::size_t count = 0;
+DigiStoreDump::dump_deposit_history(DigiContext& /*context*/, Key container_key, const DepositVector& container)  const {
   std::vector<std::string> records;
   auto line = format("|----  %s", data_header(container_key, "deposits", container).c_str());
   records.emplace_back(line);
 #ifdef DDDIGI_INPLACE_HISTORY
+  std::size_t count = 0;
   for( const auto& item : container )   {
     auto rec = dump_history(context, container_key, item, count++);
     records.insert(records.end(), rec.begin(), rec.end());
diff --git a/DDG4/python/DDG4.py b/DDG4/python/DDG4.py
index d396a1af58bbd7fd53d89428f6e0063bfebc1709..84a50de6265ff5cbbe957c8aa05c6628ac76091f 100644
--- a/DDG4/python/DDG4.py
+++ b/DDG4/python/DDG4.py
@@ -134,11 +134,14 @@ def _registerGlobalFilter(self, filter):
 def _evalProperty(data):
   """
     Function necessary to extract real strings from the property value.
-    Strings may be emraced by quotes: '<value>'
+    Strings may be embraced by quotes: '<value>'
   """
   try:
     if isinstance(data, str):
-      return eval(data)
+      import ast
+      return ast.literal_eval(data)
+  except ValueError:
+    pass
   except TypeError:
     pass
   finally:
diff --git a/DDG4/src/Geant4Kernel.cpp b/DDG4/src/Geant4Kernel.cpp
index bc42fb39fb4dca32ca0ff783022f038901963a61..64c1f2c2b55faa19a8d5bd53e379cc83b5cff9f5 100644
--- a/DDG4/src/Geant4Kernel.cpp
+++ b/DDG4/src/Geant4Kernel.cpp
@@ -12,22 +12,22 @@
 //==========================================================================
 
 // Framework include files
-#include "DD4hep/Detector.h"
-#include "DD4hep/Memory.h"
-#include "DD4hep/Plugins.h"
-#include "DD4hep/Printout.h"
-#include "DD4hep/Primitives.h"
-#include "DD4hep/InstanceCount.h"
+#include <DD4hep/Detector.h>
+#include <DD4hep/Memory.h>
+#include <DD4hep/Plugins.h>
+#include <DD4hep/Printout.h>
+#include <DD4hep/Primitives.h>
+#include <DD4hep/InstanceCount.h>
 
-#include "DDG4/Geant4Kernel.h"
-#include "DDG4/Geant4Context.h"
-#include "DDG4/Geant4ActionPhase.h"
+#include <DDG4/Geant4Kernel.h>
+#include <DDG4/Geant4Context.h>
+#include <DDG4/Geant4ActionPhase.h>
 
 // Geant4 include files
-#include "G4RunManager.hh"
-#include "G4UIdirectory.hh"
-#include "G4Threading.hh"
-#include "G4AutoLock.hh"
+#include <G4RunManager.hh>
+#include <G4UIdirectory.hh>
+#include <G4Threading.hh>
+#include <G4AutoLock.hh>
 
 // C/C++ include files
 #include <stdexcept>
diff --git a/DDG4/src/Geant4UIManager.cpp b/DDG4/src/Geant4UIManager.cpp
index c02e8dd71afe9e2e9e8d227d602f5df03644dd3c..449da0cbdac146c6b20272e8014ed24a085b0ed5 100644
--- a/DDG4/src/Geant4UIManager.cpp
+++ b/DDG4/src/Geant4UIManager.cpp
@@ -76,8 +76,11 @@ void Geant4UIManager::configure()   {
   }
   /// Execute the chained command statements
   for(const auto& c : m_configureCommands)  {
-    info("++ Executing configure command:%s",c.c_str());
-    mgr->ApplyCommand(c.c_str());
+    info("++ Executing configure command: %s",c.c_str());
+    G4int ret = mgr->ApplyCommand(c.c_str());
+    if ( ret != 0 )  {
+      except("Failed to execute command: %s",c.c_str());
+    }
   }
 }
 
@@ -87,8 +90,11 @@ void Geant4UIManager::initialize()   {
   G4UImanager* mgr = G4UImanager::GetUIpointer();
   /// Execute the chained command statements
   for(const auto& c : m_initializeCommands)  {
-    info("++ Executing initialization command:%s",c.c_str());
-    mgr->ApplyCommand(c.c_str());
+    info("++ Executing initialization command: %s",c.c_str());
+    G4int ret = mgr->ApplyCommand(c.c_str());
+    if ( ret != 0 )  {
+      except("Failed to execute command: %s",c.c_str());
+    }
   }
 }
 
@@ -98,8 +104,11 @@ void Geant4UIManager::terminate() {
   G4UImanager* mgr = G4UImanager::GetUIpointer();
   /// Execute the chained command statements
   for(const auto& c : m_terminateCommands)  {
-    info("++ Executing finalization command:%s",c.c_str());
-    mgr->ApplyCommand(c.c_str());
+    info("++ Executing finalization command: %s",c.c_str());
+    G4int ret = mgr->ApplyCommand(c.c_str());
+    if ( ret != 0 )  {
+      except("Failed to execute command: %s",c.c_str());
+    }
   }
 }
 
@@ -109,8 +118,11 @@ void Geant4UIManager::applyCommand(const string& command)   {
   G4UImanager* mgr = G4UImanager::GetUIpointer();
   if ( mgr )    {
     info("++ Executing G4 command: %s",command.c_str());
-    mgr->ApplyCommand(command.c_str());
-    return;
+    G4int ret = mgr->ApplyCommand(command.c_str());
+    if ( ret == 0 )  {
+      return;
+    }
+    except("Failed to execute command: %s",command.c_str());
   }
   except("No UI reference present. Too early to interact with Geant4!");
 }
@@ -180,24 +192,24 @@ void Geant4UIManager::start() {
   }
   /// Configure visualization instance
   if ( !m_visSetup.empty() ) {
-    info("++ Executing visualization setup:%s",m_visSetup.c_str());
+    info("++ Executing visualization setup: %s",m_visSetup.c_str());
     mgr->ApplyCommand(make_cmd(m_visSetup).c_str());
   }
   /// Configure UI instance
   if ( !m_uiSetup.empty() )   {
-    info("++ Executing UI setup:%s",m_uiSetup.c_str());
+    info("++ Executing UI setup: %s",m_uiSetup.c_str());
     mgr->ApplyCommand(make_cmd(m_uiSetup).c_str());
     executed_statements = true;
   }
   /// Execute the chained macro files
   for(const auto& m : m_macros)  {
-    info("++ Executing Macro file:%s",m.c_str());
+    info("++ Executing Macro file: %s",m.c_str());
     mgr->ApplyCommand(make_cmd(m.c_str()));
     executed_statements = true;
   }
   /// Execute the chained pre-run command statements
   for(const auto& c : m_preRunCommands)  {
-    info("++ Executing pre-run statement:%s",c.c_str());
+    info("++ Executing pre-run statement: %s",c.c_str());
     mgr->ApplyCommand(c.c_str());
     executed_statements = true;
   }
@@ -206,7 +218,7 @@ void Geant4UIManager::start() {
     m_ui->SessionStart();
     /// Execute the chained post-run command statements
     for(const auto& c : m_postRunCommands)  {
-      info("++ Executing post-run statement:%s",c.c_str());
+      info("++ Executing post-run statement: %s",c.c_str());
       mgr->ApplyCommand(c.c_str());
       executed_statements = true;
     }
@@ -219,7 +231,7 @@ void Geant4UIManager::start() {
   else if ( executed_statements )  {
     /// Execute the chained post-run command statements
     for(const auto& c : m_postRunCommands)  {
-      info("++ Executing post-run statement:%s",c.c_str());
+      info("++ Executing post-run statement: %s",c.c_str());
       mgr->ApplyCommand(c.c_str());
     }
     return;