diff --git a/EXE_GdbModifyCurve.cpp b/EXE_GdbModifyCurve.cpp
index a7669cb..b997fb3 100644
--- a/EXE_GdbModifyCurve.cpp
+++ b/EXE_GdbModifyCurve.cpp
@@ -29,6 +29,7 @@
 #include "/EgtDev/Include/EGkCurveLocal.h"
 #include "/EgtDev/Include/EGkCurveAux.h"
 #include "/EgtDev/Include/EGkOffsetCurve.h"
+#include "/EgtDev/Include/EGkMedialAxis.h"
 #include "/EgtDev/Include/EGkChainCurves.h"
 #include "/EgtDev/Include/EGkSurfFlatRegion.h"
 #include "/EgtDev/Include/EGkExtTExt.h"
@@ -145,6 +146,39 @@ ExeOffsetCurveAdv( int nId, double dDist, int nType, int* pnCount)
    return nFirstId ;
 }
 
+//----------------------------------------------------------------------------
+int
+ExeCurveMedialAxis( int nId)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
+  // recupero la curva
+   const ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
+  // eseguo il calcolo
+   PolyLine PL ;
+   if ( ! CurveSimpleMedialAxis( pCurve, PL))
+      return GDB_ID_NULL ;
+  // creo la curva
+   PtrOwner<ICurveComposite> pCompo( CreateCurveComposite()) ;
+   if ( IsNull( pCompo)  ||  ! pCompo->FromPolyLine( PL))
+      return GDB_ID_NULL ;
+  // la inserisco nel DB geometrico
+   int nNewId = pGeomDB->InsertGeoObj( GDB_ID_NULL, nId, GDB_AFTER, Release( pCompo)) ;
+  // copio gli attributi
+   pGeomDB->CopyAttributes( nId, nNewId) ;
+  // notifico la modifica
+   if ( nNewId != GDB_ID_NULL)
+      ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua ;
+      sLua = "EgtCurveMedialAxis(" + ToString( nId) + ")" +
+             " -- Id=" + ToString( nNewId) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+   return nNewId ;  
+}
+
 //-------------------------------------------------------------------------------
 bool
 ExeApproxCurve( int nId, int nApprType, double dLinTol)
diff --git a/EXE_Lua.cpp b/EXE_Lua.cpp
index 711cc9d..73d3d15 100644
--- a/EXE_Lua.cpp
+++ b/EXE_Lua.cpp
@@ -202,6 +202,14 @@ ExeLuaResetGlobVar( const string& sVar)
    return LuaResetGlobVar( sVar) ;
 }
 
+//-----------------------------------------------------------------------------
+bool
+ExeLuaExistsFunction( const string& sFun)
+{
+  // verifica esistenza funzione
+   return LuaExistsFunction( sFun) ;
+}
+
 //-----------------------------------------------------------------------------
 bool
 ExeLuaCallFunction( const string& sFun)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index f3a1091..4f73b14 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_Base.h b/LUA_Base.h
index 5d344c2..3e67898 100644
--- a/LUA_Base.h
+++ b/LUA_Base.h
@@ -1,13 +1,13 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2015-2015
+//  EgalTech 2015-2022
 //----------------------------------------------------------------------------
-// File : LUA_Base.h             Data : 21.03.15        Versione : 1.6c6
+// File : LUA_Base.h             Data : 26.08.22        Versione : 2.4h4
 // Contenuto : Dichiarazioni per funzioni di base gestione LUA.
 //
 //
 //
 // Modifiche : 21.03.15 DS Creazione modulo.
-//
+//             26.08.22 DS Aggiunta funzione LuaExistsFunction.
 //
 //----------------------------------------------------------------------------
 
@@ -29,6 +29,8 @@ bool LuaGetGlobVar( const std::string& sVar, T& Val)
       { return LuaGetGlobVar( LuaGetLuaMgr().GetLuaState(), sVar, Val) ; }
 bool LuaResetGlobVar( const std::string& sVar) ;
 bool LuaCreateGlobTable( const std::string& sVar) ;
+inline bool LuaExistsFunction( const std::string& sFunName)
+      { return LuaGetLuaMgr().ExistsFunction( sFunName) ; }
 template<typename... Args>
 bool LuaCallFunction( const std::string& sFunName, int nRets, const Args&... params)
       { return LuaGetLuaMgr().CallFunction( sFunName, nRets, params...) ; }
diff --git a/LUA_GdbModifyCurve.cpp b/LUA_GdbModifyCurve.cpp
index 36778d4..de26271 100644
--- a/LUA_GdbModifyCurve.cpp
+++ b/LUA_GdbModifyCurve.cpp
@@ -81,6 +81,23 @@ LuaOffsetCurveAdv( lua_State* L)
    return 2 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaCurveMedialAxis( lua_State* L)
+{
+  // 1 parametro : Id
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   LuaClearStack( L) ;
+  // calcolo del Medial Axis della curva
+   int nNewId = ExeCurveMedialAxis( nId) ;
+   if ( nNewId != GDB_ID_NULL)
+      LuaSetParam( L, nNewId) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaApproxCurve( lua_State* L)
@@ -901,6 +918,7 @@ LuaInstallGdbModifyCurve( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtInvertCurve", LuaInvertCurve) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtOffsetCurve", LuaOffsetCurve) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtOffsetCurveAdv", LuaOffsetCurveAdv) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtCurveMedialAxis", LuaCurveMedialAxis) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtApproxCurve", LuaApproxCurve) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtProjectCurveOnPlane", LuaProjectCurveOnPlane) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtChangeClosedCurveStart", LuaChangeClosedCurveStart) ;
diff --git a/LUA_General.cpp b/LUA_General.cpp
index 154706f..7d69e59 100644
--- a/LUA_General.cpp
+++ b/LUA_General.cpp
@@ -949,6 +949,20 @@ LuaGetLanguage( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaGetMsg( lua_State* L)
+{
+  // 1 parametro : nMsg
+   int nMsg ;
+   LuaCheckParam( L, 1, nMsg)
+   LuaClearStack( L) ;
+  // recupero il nome della lingua corrente
+   string sMsg = ExeGetMsg( nMsg) ;
+   LuaSetParam( L, sMsg) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaWinExec( lua_State* L)
@@ -1202,6 +1216,7 @@ LuaInstallGeneral( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtGetVersion", LuaGetVersion) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtIs64bit", LuaIs64bit) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtGetLanguage", LuaGetLanguage) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtMsg", LuaGetMsg) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtDialogBox", LuaDialogBox) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtWinExec", LuaWinExec) ;