diff --git a/GdbObj.cpp b/GdbObj.cpp
index 206c2a2..69c8409 100644
--- a/GdbObj.cpp
+++ b/GdbObj.cpp
@@ -23,6 +23,7 @@
 #include "/EgtDev/Include/EGkGdbFunct.h"
 #include "/EgtDev/Include/EGkStringUtils3d.h"
 #include "/EgtDev/Include/EGkObjUserFactory.h"
+#include "/EgtDev/Include/EGnStringKeyVal.h"
 #include <new>
 
 using namespace std ;
@@ -1004,6 +1005,9 @@ GdbObj::SaveObjUser( NgeWriter& ngeOut) const
       STRVECTOR vString ;
       if ( ! m_pObjUser->Save( vString))
          return false ;
+     // eseguo validazione di queste stringhe
+      for ( auto iIter = vString.begin() ; iIter != vString.end() ; ++ iIter)
+         ValidateKeyVal( *iIter) ;
      // scrivo i dati :
       // flag presenza ObjUser
       if ( ! ngeOut.WriteKey( NGE_U))
diff --git a/ObjUserFactory.cpp b/ObjUserFactory.cpp
index 51a798e..926b57d 100644
--- a/ObjUserFactory.cpp
+++ b/ObjUserFactory.cpp
@@ -15,18 +15,20 @@
 #include "stdafx.h"
 #include "/EgtDev/Include/EGkObjUserFactory.h"
 
+using namespace std ;
+
 //----------------------------------------------------------------------------
 bool
-ObjUserFactory::Register( const std::string& sName, ObjUserCreator Creator)
+ObjUserFactory::Register( const string& sName, ObjUserCreator Creator)
 {
    return GetCreatorMap().emplace( sName, Creator).second ;
 }
 
 //----------------------------------------------------------------------------
 IObjUser*
-ObjUserFactory::Create( const std::string& sName)
+ObjUserFactory::Create( const string& sName)
 {
-   CreatorMap::iterator Iter = GetCreatorMap().find( sName) ;
+   auto Iter = GetCreatorMap().find( sName) ;
    if ( Iter != GetCreatorMap().end()) {
       if ( Iter->second != nullptr)
          return Iter->second() ;
@@ -34,6 +36,19 @@ ObjUserFactory::Create( const std::string& sName)
    return nullptr ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ObjUserFactory::GetList( STRVECTOR& vsList)
+{
+  // verifico parametro di ritorno
+   if ( &vsList == nullptr)
+      return false ;
+  // ciclo sugli oggetti registrati
+   for ( auto Iter = GetCreatorMap().cbegin() ; Iter != GetCreatorMap().cend() ; ++ Iter)
+     vsList.emplace_back( Iter->first) ;
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 ObjUserFactory::CreatorMap&
 ObjUserFactory::GetCreatorMap( void)