diff --git a/EXE_GdbModifyCurve.cpp b/EXE_GdbModifyCurve.cpp
index 8ab67ea..e9c4bd6 100644
--- a/EXE_GdbModifyCurve.cpp
+++ b/EXE_GdbModifyCurve.cpp
@@ -1541,6 +1541,47 @@ ExeAddCurveCompoCurve( int nId, int nAddCrvId, bool bEraseOrig, bool bEndVsStart
    return bOk ;
 }
 
+//-------------------------------------------------------------------------------
+bool
+ExeAddCurveCompoLineTg( int nId, double dLen, bool bEndVsStart)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+   bool bOk = true ;
+  // recupero la curva composita
+   ICurveComposite* pCompo = GetCurveComposite( pGeomDB->GetGeoObj( nId)) ;
+   bOk = bOk && ( pCompo != nullptr) ;
+  // calcolo punto di allungo
+   Point3d ptNew ;
+   if ( bEndVsStart) {
+      Point3d ptEnd ;
+      Vector3d vtEnd ;
+      bOk = bOk && pCompo->GetEndPoint( ptEnd) && pCompo->GetEndDir( vtEnd) ;
+      if ( bOk)
+         ptNew = ptEnd + vtEnd * dLen ;
+   }
+   else {
+      Point3d ptStart ;
+      Vector3d vtStart ;
+      bOk = bOk && pCompo->GetStartPoint( ptStart) && pCompo->GetStartDir( vtStart) ;
+      if ( bOk)
+         ptNew = ptStart - vtStart * dLen ;
+   }
+  // eseguo la modifica
+   bOk = bOk && pCompo->AddLine( ptNew, bEndVsStart) ;
+   ExeSetModified() ;
+  // se richiesto, salvo il comando Lua equivalente
+   if ( IsCmdLog()) {
+      string sLua = "EgtAddCurveCompoLineTg(" + ToString( nId) + ",{" +
+                                                ToString( dLen) + "}," +
+                                                ( bEndVsStart ? "true" : "false") + ")" +
+                    " -- Ok=" + ToString( bOk) ;
+      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
+   }
+  // restituisco il risultato
+   return bOk ;
+}
+
 //-------------------------------------------------------------------------------
 bool
 ExeAddCurveCompoLine( int nId, const Point3d& ptP, bool bEndVsStart, int nRefType)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index e022aff..e30aa0b 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbModifyCurve.cpp b/LUA_GdbModifyCurve.cpp
index 9fcee58..ddff33e 100644
--- a/LUA_GdbModifyCurve.cpp
+++ b/LUA_GdbModifyCurve.cpp
@@ -590,6 +590,24 @@ LuaAddCurveCompoCurve( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaAddCurveCompoLineTg( lua_State* L)
+{
+  // 2 o 3 parametri : Id, dLen [, bEndVsStart]
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   double dLen ;
+   LuaCheckParam( L, 2, dLen)
+   bool bEndVsStart = true ;
+   LuaGetParam( L, 3, bEndVsStart) ;
+   LuaClearStack( L) ;
+  // aggiungo una linea in coda alla curva composita
+   bool bOk = ExeAddCurveCompoLineTg( nId, dLen, bEndVsStart) ;
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaAddCurveCompoLine( lua_State* L)
@@ -909,6 +927,7 @@ LuaInstallGdbModifyCurve( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtModifyArcByFlip", LuaModifyArcByFlip) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCloseCurveCompo", LuaCloseCurveCompo) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtAddCurveCompoCurve", LuaAddCurveCompoCurve) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtAddCurveCompoLineTg", LuaAddCurveCompoLineTg) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtAddCurveCompoLine", LuaAddCurveCompoLine) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtAddCurveCompoArcTg", LuaAddCurveCompoArcTg) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtAddCurveCompoArc2P", LuaAddCurveCompoArc2P) ;