diff --git a/EXE_GdbGetCurve.cpp b/EXE_GdbGetCurve.cpp
index 1e1c33b..a1b7022 100644
--- a/EXE_GdbGetCurve.cpp
+++ b/EXE_GdbGetCurve.cpp
@@ -72,6 +72,27 @@ ExeCurveParamAtLength( int nId, double dLen, double* pdPar)
    return ( pCurve != nullptr  &&  pCurve->GetParamAtLength( dLen, *pdPar)) ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeCurveParamAtPoint( int nId, const Point3d& ptP, double dTol, int nRefType, double* pdPar)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // verifico il parametro
+   if ( pdPar == nullptr)
+      return false ;
+  // recupero la curva
+   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
+   bool bOk = ( pCurve != nullptr) ;
+  // recupero il riferimento locale
+   Frame3d frLoc ;
+   bOk = bOk && pGeomDB->GetGlobFrame( nId, frLoc) ;
+  // porto il punto in locale 
+   Point3d ptL = GetPointLocal( pGeomDB, ptP, nRefType, frLoc) ; 
+  // recupero il parametro in corrispondenza ptL
+   return ( bOk && pCurve->GetParamAtPoint( ptL, *pdPar, dTol)) ;
+}
+
 //----------------------------------------------------------------------------
 bool
 ExeCurveLengthAtPoint( int nId, const Point3d& ptOn, double dExtend, double* pdLen)
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 1983f21..0ca4a04 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GdbGetCurve.cpp b/LUA_GdbGetCurve.cpp
index a60fd7d..8f32e0b 100644
--- a/LUA_GdbGetCurve.cpp
+++ b/LUA_GdbGetCurve.cpp
@@ -76,6 +76,29 @@ LuaCurveParamAtLength( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaCurveParamAtPoint( lua_State* L)
+{
+  // 2 o 3 o 4 parametri : nId, pt [, dTol, nRefType]
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   Point3d ptP ;
+   LuaCheckParam( L, 2, ptP)
+   double dTol = EPS_SMALL ;
+   LuaGetParam( L, 3, dTol) ;
+   int nRefType = RTY_DEFAULT ;
+   LuaGetParam( L, 4, nRefType) ;
+   LuaClearStack( L) ;
+  // recupero il parametro in corrispondenza di pt
+   double dPar ;
+   if ( ExeCurveParamAtPoint( nId, ptP, dTol, nRefType, &dPar))
+      LuaSetParam( L, dPar) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaCurveIsClosed( lua_State* L)
@@ -497,6 +520,7 @@ LuaInstallGdbGetCurve( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveDomain", LuaCurveDomain) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveLength", LuaCurveLength) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveParamAtLength", LuaCurveParamAtLength) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtCurveParamAtPoint", LuaCurveParamAtPoint) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveIsClosed", LuaCurveIsClosed) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveIsFlat", LuaCurveIsFlat) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveIsACircle", LuaCurveIsACircle) ;