diff --git a/EXE_GdbModifyCurve.cpp b/EXE_GdbModifyCurve.cpp
index 42a114a..d284866 100644
--- a/EXE_GdbModifyCurve.cpp
+++ b/EXE_GdbModifyCurve.cpp
@@ -452,9 +452,9 @@ ExeTrimExtendCurveByLen( int nId, double dLen, const Point3d& ptNear, int nRefTy
   // porto in locale il punto
    Point3d ptNearL = GetPointLocal( pGeomDB, ptNear, nRefType, frLoc) ;
   // cerco l'estremo pių vicino al punto passato
-   Point3d ptStart, ptEnd ;
-   if ( bOk  &&  pCurve->GetStartPoint( ptStart)  &&  pCurve->GetEndPoint( ptEnd)) {
-      if ( SqDist( ptStart, ptNearL) < SqDist( ptEnd, ptNearL)) {
+   bool bStart ;
+   if ( bOk  &&  pCurve->GetNearestExtremityToPoint( ptNearL, bStart)) {
+      if ( bStart) {
          if ( dLen < - EPS_SMALL)
             bOk = pCurve->TrimStartAtLen( - dLen) ;
          else if ( dLen > EPS_SMALL)
@@ -469,6 +469,23 @@ ExeTrimExtendCurveByLen( int nId, double dLen, const Point3d& ptNear, int nRefTy
             bOk = pCurve->ExtendEndByLen( dLen) ;
       }
    }
+   //Point3d ptStart, ptEnd ;
+   //if ( bOk  &&  pCurve->GetStartPoint( ptStart)  &&  pCurve->GetEndPoint( ptEnd)) {
+   //   if ( SqDist( ptStart, ptNearL) < SqDist( ptEnd, ptNearL)) {
+   //      if ( dLen < - EPS_SMALL)
+   //         bOk = pCurve->TrimStartAtLen( - dLen) ;
+   //      else if ( dLen > EPS_SMALL)
+   //         bOk = pCurve->ExtendStartByLen( dLen) ;
+   //   }
+   //   else {
+   //      if ( dLen < - EPS_SMALL) {
+   //         double dCrvLen ;
+   //         bOk = pCurve->GetLength( dCrvLen) && pCurve->TrimEndAtLen( dCrvLen + dLen) ;
+   //      }
+   //      else if ( dLen > EPS_SMALL)
+   //         bOk = pCurve->ExtendEndByLen( dLen) ;
+   //   }
+   //}
    else
       bOk = false ;
    ExeSetModified() ;
diff --git a/EXE_GeoSnap.cpp b/EXE_GeoSnap.cpp
index 2e77377..1c032a8 100644
--- a/EXE_GeoSnap.cpp
+++ b/EXE_GeoSnap.cpp
@@ -573,6 +573,23 @@ ExeFrame( int nId, int nRefId, Frame3d& frFrame)
    return false ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeCurveDomain( int nId, double* pdStart, double* pdEnd)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // verifico i parametri
+   if ( pdStart == nullptr  ||  pdEnd == nullptr)
+      return false ;
+  // recupero la curva
+   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
+   if ( pCurve == nullptr)
+      return false ;
+  // recupero il dominio
+   return pCurve->GetDomain( *pdEnd, *pdEnd) ;
+}
+
 //----------------------------------------------------------------------------
 bool
 ExeCurveLength( int nId, double* pdLen)
@@ -634,6 +651,18 @@ ExeCurveLengthAtPoint( int nId, const Point3d& ptOn, double dExtend, double* pdL
    return false ;
 }
 
+//----------------------------------------------------------------------------
+bool
+ExeCurveNearestExtremityToPoint( int nId, const Point3d& ptP, bool& bStart)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+  // recupero la curva
+   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
+  // recupero quale estremo č pių vicino al punto
+   return ( pCurve != nullptr  &&  pCurve->GetNearestExtremityToPoint( ptP, bStart)) ;
+}
+
 //----------------------------------------------------------------------------
 bool
 ExeCurveExtrusion( int nId, int nRefId, Vector3d& vtExtr)
@@ -666,11 +695,11 @@ ExeCurveThickness( int nId, double* pdThick)
 
 //----------------------------------------------------------------------------
 bool
-ExeGetMinDistPointCurve( const Point3d& ptP, int nId, double* pdDist)
+ExeGetMinDistPointCurve( const Point3d& ptP, int nId, double* pdDist, double* pdU)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
-  // verifico i parametri
+  // verifico il primo parametro di ritorno obbligatorio
    if ( pdDist == nullptr)
       return false ;
   // recupero la curva
@@ -678,8 +707,13 @@ ExeGetMinDistPointCurve( const Point3d& ptP, int nId, double* pdDist)
    if ( pCurve == nullptr)
       return false ;
   // calcolo la minima distanza
+   int nFlag ;
    DistPointCurve distPC( ptP, *pCurve) ;
-   return distPC.GetDist( *pdDist) ;
+   if ( ! distPC.GetDist( *pdDist))
+      return false ;
+   if ( pdU != nullptr  &&  ! distPC.GetParamAtMinDistPoint( 0, *pdU, nFlag))
+      return false ;
+   return true ;
 }
 
 //----------------------------------------------------------------------------
diff --git a/EXE_Messages.cpp b/EXE_Messages.cpp
index 2762587..3b8f41c 100644
--- a/EXE_Messages.cpp
+++ b/EXE_Messages.cpp
@@ -15,7 +15,7 @@
 #include "stdafx.h"
 #include "EXE.h"
 #include "/EgtDev/Include/EXeExecutor.h"
-#include "/EgtDEv/Include/EGnScan.h"
+#include "/EgtDEv/Include/EGnScanner.h"
 #include "/EgtDev/Include/EGnStringUtils.h"
 #include "/EgtDev/Include/EgtStringConverter.h"
 #include "/EgtDev/Include/EgtLogger.h"
diff --git a/EgtExecutor.rc b/EgtExecutor.rc
index 5562df6..1f48023 100644
Binary files a/EgtExecutor.rc and b/EgtExecutor.rc differ
diff --git a/LUA_GeoSnap.cpp b/LUA_GeoSnap.cpp
index 2f50144..fc6b04d 100644
--- a/LUA_GeoSnap.cpp
+++ b/LUA_GeoSnap.cpp
@@ -279,6 +279,27 @@ LuaFrame( lua_State* L)
    return 1 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaCurveDomain( lua_State* L)
+{
+  // 1 parametro : Id
+   int nId ;
+   LuaCheckParam( L, 1, nId)
+   LuaClearStack( L) ;
+  // recupero il dominio della curva
+   double dStart, dEnd ;
+   if ( ExeCurveDomain( nId, &dStart, &dEnd) != FALSE) {
+      LuaSetReturn( L, dStart) ;
+      LuaSetReturn( L, dEnd) ;
+      return 2 ;
+   }
+   else {
+      LuaSetReturn( L) ;
+      return 1 ;
+   }
+}
+
 //----------------------------------------------------------------------------
 static int
 LuaCurveLength( lua_State* L)
@@ -566,6 +587,7 @@ LuaInstallGeoSnap( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtUV", LuaAtParamVector) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtFR", LuaFrame) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtET", LuaExtrusionByThickness) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtCurveDomain", LuaCurveDomain) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveLength", LuaCurveLength) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveExtrusion", LuaCurveExtrusion) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtCurveThickness", LuaCurveThickness) ;