diff --git a/EXE_GdbGetCurve.cpp b/EXE_GdbGetCurve.cpp
index a1b7022..04bbe0b 100644
--- a/EXE_GdbGetCurve.cpp
+++ b/EXE_GdbGetCurve.cpp
@@ -548,6 +548,24 @@ ExeArcNormVersor( int nId, int nRefId, Vector3d& vtNorm)
    return TransformVector( pGeomDB, nId, nRefId, vtNorm) ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeCurveCompoLength( int nId, int nSimpCrv, double& dLen)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la curva composita
+   const ICurveComposite* pCompoCrv = GetCurveComposite( pGeomDB->GetGeoObj( nId)) ;
+   if ( pCompoCrv == nullptr)
+      return false ;
+  // recupero la curva semplice di indice richiesto
+   const ICurve* pSimpCrv = pCompoCrv->GetCurve( nSimpCrv) ;
+   if ( pSimpCrv == nullptr)
+      return false ;
+  // recupero la sua lunghezza
+   return pSimpCrv->GetLength( dLen) ;
+}
+
 //----------------------------------------------------------------------------
 bool
 ExeCurveCompoCenter( int nId, int nSimpCrv, int nRefId, Point3d& ptCen)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 8992e6d..c6a95ab 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbGetCurve.cpp b/LUA_GdbGetCurve.cpp
index 8f32e0b..112d39d 100644
--- a/LUA_GdbGetCurve.cpp
+++ b/LUA_GdbGetCurve.cpp
@@ -432,6 +432,25 @@ LuaArcNormVersor( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaCurveCompoLength( lua_State* L)
+{
+  // 2 parametri : Id, nCrv
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   int nCrv ;
+   LuaCheckParam( L, 2, nCrv)
+   LuaClearStack( L) ;
+  // recupero il centro della curva semplice indicizzata
+   double dLen ;
+   if ( ExeCurveCompoLength( nId, nCrv, dLen))
+      LuaSetParam( L, dLen) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaCurveCompoCenter( lua_State* L)
@@ -538,6 +557,7 @@ LuaInstallGdbGetCurve( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtArcAngCenter", LuaArcAngCenter) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArcDeltaN", LuaArcDeltaN) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtArcNormVersor", LuaArcNormVersor) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtCurveCompoLength", LuaCurveCompoLength) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveCompoCenter", LuaCurveCompoCenter) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveCompoRadius", LuaCurveCompoRadius) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveCompoAngCenter", LuaCurveCompoAngCenter) ;