diff --git a/EXE_BeamMgr.cpp b/EXE_BeamMgr.cpp
index 6ce6694..2127352 100644
--- a/EXE_BeamMgr.cpp
+++ b/EXE_BeamMgr.cpp
@@ -113,12 +113,43 @@ ExeBeamSetPartBox( double dLength, double dHeight, double dWidth)
 //-----------------------------------------------------------------------------
 int
 ExeBeamAddProcess( int nGroup, int nProc, int nSide, const string& sDes, int nProcId,
-                   const Frame3d& frRef, const DBLVECTOR& vdPar, const string& sPar)
+                   const Frame3d& frRef, const DBLVECTOR& vdPar, const string& sPar, bool bUpdate)
 {
    IBeamMgr* pBeamMgr = GetCurrBeamMgr() ;
    VERIFY_BEAMMGR( pBeamMgr, false)
-  // imposto le dimensioni al pezzo corrente
-   return pBeamMgr->AddProcess( nGroup, nProc, nSide, sDes, nProcId, frRef, vdPar, sPar) ;
+  // aggiungo una feature al pezzo corrente
+   return pBeamMgr->AddProcess( nGroup, nProc, nSide, sDes, nProcId, frRef, vdPar, sPar, bUpdate) ;
+}
+
+//-----------------------------------------------------------------------------
+int
+ExeBeamModifyProcess( int nGeomId, int nGroup, int nProc, int nSide, const string& sDes, int nProcId,
+                      const Frame3d& frRef, const DBLVECTOR& vdPar, const string& sPar, bool bUpdate)
+{
+   IBeamMgr* pBeamMgr = GetCurrBeamMgr() ;
+   VERIFY_BEAMMGR( pBeamMgr, false)
+  // modifico una feature di un pezzo
+   return pBeamMgr->ModifyProcess( nGeomId, nGroup, nProc, nSide, sDes, nProcId, frRef, vdPar, sPar, bUpdate) ;
+}
+
+//-----------------------------------------------------------------------------
+bool
+ExeBeamEraseProcess( int nGeomId, bool bUpdate)
+{
+   IBeamMgr* pBeamMgr = GetCurrBeamMgr() ;
+   VERIFY_BEAMMGR( pBeamMgr, false)
+  // cancello una feature di un pezzo
+   return pBeamMgr->EraseProcess( nGeomId, bUpdate) ;
+}
+
+//-----------------------------------------------------------------------------
+bool
+ExeBeamEnableProcess( int nGeomId, bool bEnable, bool bUpdate)
+{
+   IBeamMgr* pBeamMgr = GetCurrBeamMgr() ;
+   VERIFY_BEAMMGR( pBeamMgr, false)
+  // abilito la lavorazione di una feature di un pezzo
+   return pBeamMgr->EnableProcess( nGeomId, bEnable, bUpdate) ;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/LUA_BeamMgr.cpp b/LUA_BeamMgr.cpp
index 50fe4d5..ccf281d 100644
--- a/LUA_BeamMgr.cpp
+++ b/LUA_BeamMgr.cpp
@@ -133,7 +133,7 @@ LuaBeamSetPartBox( lua_State* L)
 static int
 LuaBeamAddProcess( lua_State* L)
 {
-  // 8 parametri : nGroup, nProc, nSide, sDes, nProcId, vdPar, sPar
+  // 8 o 9 parametri : nGroup, nProc, nSide, sDes, nProcId, vdPar, sPar [, bUpdate]
    int nGroup ;
    LuaCheckParam( L, 1, nGroup)
    int nProc ;
@@ -150,9 +150,11 @@ LuaBeamAddProcess( lua_State* L)
    LuaCheckParam( L, 7, vdPar)
    string sPar ;
    LuaCheckParam( L, 8, sPar)
+   bool bUpdate = true ;
+   LuaGetParam( L, 9, bUpdate) ;
    LuaClearStack( L) ;
   // aggiungo la feature indicata
-   int nNewId = ExeBeamAddProcess( nGroup, nProc, nSide, sDes, nProcId, frRef, vdPar, sPar) ;
+   int nNewId = ExeBeamAddProcess( nGroup, nProc, nSide, sDes, nProcId, frRef, vdPar, sPar, bUpdate) ;
   // restituisco il risultato
    if ( nNewId != GDB_ID_NULL)
       LuaSetParam( L, nNewId) ;
@@ -161,6 +163,78 @@ LuaBeamAddProcess( lua_State* L)
    return 1 ;
 }
 
+//-------------------------------------------------------------------------------
+static int
+LuaBeamModifyProcess( lua_State* L)
+{
+  // 9 o 10 parametri : nGeomId, nGroup, nProc, nSide, sDes, nProcId, vdPar, sPar [, bUpdate]
+   int nGeomId ;
+   LuaCheckParam( L, 1, nGeomId)
+   int nGroup ;
+   LuaCheckParam( L, 2, nGroup)
+   int nProc ;
+   LuaCheckParam( L, 3, nProc)
+   int nSide ;
+   LuaCheckParam( L, 4, nSide)
+   string sDes ;
+   LuaCheckParam( L, 5, sDes)
+   int nProcId ;
+   LuaCheckParam( L, 6, nProcId)
+   Frame3d frRef ;
+   LuaCheckParam( L, 7, frRef)
+   DBLVECTOR vdPar ;
+   LuaCheckParam( L, 8, vdPar)
+   string sPar ;
+   LuaCheckParam( L, 9, sPar)
+   bool bUpdate = true ;
+   LuaGetParam( L, 10, bUpdate) ;
+   LuaClearStack( L) ;
+  // modifico la feature indicata
+   int nNewId = ExeBeamModifyProcess( nGeomId, nGroup, nProc, nSide, sDes, nProcId, frRef, vdPar, sPar, bUpdate) ;
+  // restituisco il risultato
+   if ( nNewId != GDB_ID_NULL)
+      LuaSetParam( L, nNewId) ;
+   else
+      LuaSetParam( L) ;
+   return 1 ;
+}
+
+//-------------------------------------------------------------------------------
+static int
+LuaBeamEraseProcess( lua_State* L)
+{
+  // 1 o 2 parametri : nGeomId [, bUpdate]
+   int nGeomId ;
+   LuaCheckParam( L, 1, nGeomId)
+   bool bUpdate = true ;
+   LuaGetParam( L, 2, bUpdate) ;
+   LuaClearStack( L) ;
+  // cancello la feature indicata
+   bool bOk = ExeBeamEraseProcess( nGeomId, bUpdate) ;
+  // restituisco il risultato
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
+//-------------------------------------------------------------------------------
+static int
+LuaBeamEnableProcess( lua_State* L)
+{
+  // 2 o 3 parametri : nGeomId, bEnable [, bUpdate]
+   int nGeomId ;
+   LuaCheckParam( L, 1, nGeomId)
+   bool bEnable ;
+   LuaCheckParam( L, 2, bEnable)
+   bool bUpdate = true ;
+   LuaGetParam( L, 3, bUpdate) ;
+   LuaClearStack( L) ;
+  // abilito la lavorazione della feature indicata
+   bool bOk = ExeBeamEnableProcess( nGeomId, bEnable, bUpdate) ;
+  // restituisco il risultato
+   LuaSetParam( L, bOk) ;
+   return 1 ;
+}
+
 //-------------------------------------------------------------------------------
 static int
 LuaBeamCalcSolid( lua_State* L)
@@ -254,6 +328,9 @@ LuaInstallBeamMgr( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtBeamSetPartCount", LuaBeamSetPartCount) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtBeamSetPartBox", LuaBeamSetPartBox) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtBeamAddProcess", LuaBeamAddProcess) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtBeamModifyProcess", LuaBeamModifyProcess) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtBeamEraseProcess", LuaBeamEraseProcess) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtBeamEnableProcess", LuaBeamEnableProcess) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtBeamCalcSolid", LuaBeamCalcSolid) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtBeamGetSolid", LuaBeamGetSolid) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtBeamShowSolid", LuaBeamShowSolid) ;