diff --git a/EExExportConst.h b/EExExportConst.h
index f7f10e4..e0fa1f8 100644
--- a/EExExportConst.h
+++ b/EExExportConst.h
@@ -1,13 +1,13 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2014-2014
+//  EgalTech 2014-2020
 //----------------------------------------------------------------------------
-// File : EExExportConst.h        Data : 07.08.14          Versione : 1.5h2
+// File : EExExportConst.h        Data : 12.10.20          Versione : 2.2j3
 // Contenuto : Costanti per esportazione.
 //
 //
 //
 // Modifiche : 07.08.14 DS Creazione modulo.
-//
+//             12.10.20 DS aggiunto EEXFLAG_ADV_NAMES e EEXFLAG_DEFAULT.
 //
 //----------------------------------------------------------------------------
 
@@ -23,4 +23,6 @@ const int EEXFLT_DEFAULT = EEXFLT_LEVUSER | EEXFLT_MODESTD | EEXFLT_STAON | EEXF
 //-----------------------------------------------------------------------------
 enum EExFlag { EEXFLAG_NONE =       0x0000,
                EEXFLAG_COMP_LAYER = 0x0001,
-               EEXFLAG_COL_BY_LAYER = 0x0002} ;
+               EEXFLAG_COL_BY_LAYER = 0x0002,
+               EEXFLAG_ADV_NAMES = 0x0004} ;
+const int EEXFLAG_DEFAULT = EEXFLAG_COMP_LAYER ;
diff --git a/EGnStringUtils.h b/EGnStringUtils.h
index 8e815a1..bdb58f6 100644
--- a/EGnStringUtils.h
+++ b/EGnStringUtils.h
@@ -99,19 +99,25 @@ ValidateFileName( std::string& sName)
 
 //----------------------------------------------------------------------------
 inline bool
-IsValidDxfName( const std::string& sName)
+IsValidDxfName( const std::string& sName, bool bAdvanced)
 {
    if ( &sName == nullptr  ||  sName.empty())
       return false ;
-   return ( sName.find_first_of( " <>/\\\".:;?*|='", 0) == std::string::npos) ;
+   std::string sOut = "<>/\\\":;?*|='" ;
+   if ( ! bAdvanced)
+      sOut += " ." ;
+   return ( sName.find_first_of( sOut, 0) == std::string::npos) ;
 }
 
 //----------------------------------------------------------------------------
 inline bool
-ValidateDxfName( std::string& sName)
+ValidateDxfName( std::string& sName, bool bAdvanced)
 {
+   std::string sOut = "<>/\\\":;?*|='" ;
+   if ( ! bAdvanced)
+      sOut += " ." ;
    std::string::size_type i ;
-   while ( ( i = sName.find_first_of( " <>/\\\".:;?*|='")) != std::string::npos)
+   while ( ( i = sName.find_first_of( sOut)) != std::string::npos)
       sName[i] = '_' ;
    return true ;
 }
diff --git a/EInAPI.h b/EInAPI.h
index 4bf01c8..7af8c10 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -107,7 +107,7 @@ EIN_EXPORT BOOL __stdcall EgtImportPnt( const wchar_t* wsFilePath, int nFlag) ;
 EIN_EXPORT BOOL __stdcall EgtImportStl( const wchar_t* wsFilePath, double dScaleFactor) ;
 EIN_EXPORT BOOL __stdcall EgtAdvancedImportIsEnabled( void) ;
 EIN_EXPORT BOOL __stdcall EgtAdvancedImport( const wchar_t* wsFilePath) ;
-EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath) ;
+EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath, int nFlag) ;
 EIN_EXPORT BOOL __stdcall EgtExportStl( int nId, const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtExportSvg( int nId, const wchar_t* wsFilePath) ;
 
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 07a2250..e28c289 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -113,7 +113,7 @@ EXE_EXPORT bool ExeImportPnt( const std::string& sFilePath, int nFlag) ;
 EXE_EXPORT bool ExeImportStl( const std::string& sFilePath, double dScaleFactor) ;
 EXE_EXPORT bool ExeAdvancedImportIsEnabled( void) ;
 EXE_EXPORT bool ExeAdvancedImport( const std::string& sFilePath) ;
-EXE_EXPORT bool ExeExportDxf( int nId, const std::string& sFilePath) ;
+EXE_EXPORT bool ExeExportDxf( int nId, const std::string& sFilePath, int nFlag = 1) ;
 EXE_EXPORT bool ExeExportStl( int nId, const std::string& sFilePath) ;
 EXE_EXPORT bool ExeExportSvg( int nId, const std::string& sFilePath, int nFilter = 393) ;