diff --git a/EXE_GdbModifyVol.cpp b/EXE_GdbModifyVol.cpp
index 287b0bd..3e843ec 100644
--- a/EXE_GdbModifyVol.cpp
+++ b/EXE_GdbModifyVol.cpp
@@ -144,7 +144,7 @@ ExeRemoveVolZmapPart( int nId, int nPart)
 //----------------------------------------------------------------------------
 bool
 ExeVolZmapSetStdTool( const INTVECTOR& vIds, const string& sToolName,
-                      double dLen, double dDiam, double dCornR, double dCutterH, int nFlag)
+                      double dLen, double dDiam, double dCornR, double dCutterH, int nFlag, bool bFirst)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -152,7 +152,7 @@ ExeVolZmapSetStdTool( const INTVECTOR& vIds, const string& sToolName,
    bool bOk = true ;
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr  &&  pVZM->SetStdTool( sToolName, dLen, 0.5 * dDiam, dCornR, dCutterH, nFlag)) && bOk ;
+      bOk = ( pVZM != nullptr  &&  pVZM->SetStdTool( sToolName, dLen, 0.5 * dDiam, dCornR, dCutterH, nFlag, bFirst)) && bOk ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -173,7 +173,7 @@ ExeVolZmapSetStdTool( const INTVECTOR& vIds, const string& sToolName,
 //----------------------------------------------------------------------------
 bool
 ExeVolZmapSetAdvTool( const INTVECTOR& vIds, const string& sToolName,
-                      double dLen, double dDiam, double dTipLen, double dTipDiam, double dCornR, double dCutterH, int nFlag)
+                      double dLen, double dDiam, double dTipLen, double dTipDiam, double dCornR, double dCutterH, int nFlag, bool bFirst)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -181,7 +181,7 @@ ExeVolZmapSetAdvTool( const INTVECTOR& vIds, const string& sToolName,
    bool bOk = true ;
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr  &&  pVZM->SetAdvTool( sToolName, dLen, dDiam / 2, dTipLen, dTipDiam / 2, dCornR, dCutterH, nFlag)) && bOk ;
+      bOk = ( pVZM != nullptr  &&  pVZM->SetAdvTool( sToolName, dLen, dDiam / 2, dTipLen, dTipDiam / 2, dCornR, dCutterH, nFlag, bFirst)) && bOk ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -204,7 +204,7 @@ ExeVolZmapSetAdvTool( const INTVECTOR& vIds, const string& sToolName,
 //----------------------------------------------------------------------------
 bool
 ExeVolZmapSetSawTool( const INTVECTOR& vIds, const string& sToolName,
-                      double dLen, double dDiam, double dThick, double dStemDiam, double dCornR, int nFlag)
+                      double dLen, double dDiam, double dThick, double dStemDiam, double dCornR, int nFlag, bool bFirst)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -212,7 +212,7 @@ ExeVolZmapSetSawTool( const INTVECTOR& vIds, const string& sToolName,
    bool bOk = true ;
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr && pVZM->SetSawTool( sToolName, dLen, dDiam / 2, dThick, dStemDiam / 2, dCornR, nFlag)) && bOk ;
+      bOk = ( pVZM != nullptr && pVZM->SetSawTool( sToolName, dLen, dDiam / 2, dThick, dStemDiam / 2, dCornR, nFlag, bFirst)) && bOk ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -233,7 +233,7 @@ ExeVolZmapSetSawTool( const INTVECTOR& vIds, const string& sToolName,
 
 //----------------------------------------------------------------------------
 bool
-ExeVolZmapSetGenTool( const INTVECTOR& vIds, const string& sToolName, int nToolSectId, int nFlag)
+ExeVolZmapSetGenTool( const INTVECTOR& vIds, const string& sToolName, int nToolSectId, int nFlag, bool bFirst)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -243,7 +243,7 @@ ExeVolZmapSetGenTool( const INTVECTOR& vIds, const string& sToolName, int nToolS
   // recupero gli Zmap e assegno i dati dell'utensile
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr && pVZM->SetGenTool( sToolName, pCC, nFlag) && bOk) ;
+      bOk = ( pVZM != nullptr && pVZM->SetGenTool( sToolName, pCC, nFlag, bFirst) && bOk) ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -261,7 +261,7 @@ ExeVolZmapSetGenTool( const INTVECTOR& vIds, const string& sToolName, int nToolS
 //----------------------------------------------------------------------------
 bool
 ExeVolZmapSetMortiserTool( const INTVECTOR& vIds, const string& sToolName,
-                           double dLen, double dWidth, double dThick, double dCornR, int nFlag)
+                           double dLen, double dWidth, double dThick, double dCornR, int nFlag, bool bFirst)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -269,7 +269,7 @@ ExeVolZmapSetMortiserTool( const INTVECTOR& vIds, const string& sToolName,
    bool bOk = true ;
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr && pVZM->SetMortiserTool( sToolName, dLen, dWidth, dThick, dCornR, nFlag) && bOk) ;
+      bOk = ( pVZM != nullptr && pVZM->SetMortiserTool( sToolName, dLen, dWidth, dThick, dCornR, nFlag, bFirst) && bOk) ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -290,7 +290,7 @@ ExeVolZmapSetMortiserTool( const INTVECTOR& vIds, const string& sToolName,
 //----------------------------------------------------------------------------
 bool
 ExeVolZmapSetChiselTool( const INTVECTOR& vIds, const string& sToolName,
-                         double dLen, double dWidth, double dThick, int nFlag)
+                         double dLen, double dWidth, double dThick, int nFlag, bool bFirst)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -298,7 +298,7 @@ ExeVolZmapSetChiselTool( const INTVECTOR& vIds, const string& sToolName,
    bool bOk = true ;
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr && pVZM->SetChiselTool( sToolName, dLen, dWidth, dThick, nFlag) && bOk) ;
+      bOk = ( pVZM != nullptr && pVZM->SetChiselTool( sToolName, dLen, dWidth, dThick, nFlag, bFirst) && bOk) ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -317,7 +317,7 @@ ExeVolZmapSetChiselTool( const INTVECTOR& vIds, const string& sToolName,
 
 //----------------------------------------------------------------------------
 bool
-ExeVolZmapResetTool( const INTVECTOR& vIds)
+ExeVolZmapResetTools( const INTVECTOR& vIds)
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, false)
@@ -325,7 +325,7 @@ ExeVolZmapResetTool( const INTVECTOR& vIds)
    bool bOk = true ;
    for ( int i = 0 ; i < int( vIds.size()) ; ++ i) {
       IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( vIds[i])) ;
-      bOk = ( pVZM != nullptr && pVZM->ResetTool() && bOk) ;
+      bOk = ( pVZM != nullptr && pVZM->ResetTools() && bOk) ;
    }
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -397,7 +397,7 @@ ExeVolZmapMillingStep( int nId, const Point3d& ptPs, const Vector3d& vtDs,
    Vector3d vtDeL = GetVectorLocal( pGeomDB, vtDe, nRefType, frLoc) ;
   // recupero lo Zmap e eseguo movimento di fresatura con l'utensile già associato
    IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( nId)) ;
-   bOk = bOk && ( pVZM != nullptr  &&  pVZM->MillingStep( ptPsL, vtDsL, ptPeL, vtDeL)) ;
+   bOk = bOk && ( pVZM != nullptr  &&  pVZM->MillingStep( 0, ptPsL, vtDsL, ptPeL, vtDeL)) ;
    ExeSetModified() ;
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
@@ -433,7 +433,7 @@ ExeVolZmapMillingStep( int nId, const Point3d& ptPs, const Vector3d& vtDs, const
    Vector3d vtAeL = GetVectorLocal( pGeomDB, vtAe, nRefType, frLoc) ;
   // recupero lo Zmap e eseguo movimento di fresatura con l'utensile già associato
    IVolZmap* pVZM = GetVolZmap( pGeomDB->GetGeoObj( nId)) ;
-   bOk = bOk && ( pVZM != nullptr  &&  pVZM->MillingStep( ptPsL, vtDsL, vtAsL, ptPeL, vtDeL, vtAeL)) ;
+   bOk = bOk && ( pVZM != nullptr  &&  pVZM->MillingStep( 0, ptPsL, vtDsL, vtAsL, ptPeL, vtDeL, vtAeL)) ;
    ExeSetModified() ;
   // se richiesto, salvo il comando Lua equivalente
    if ( IsCmdLog()) {
diff --git a/LUA_GdbModifyVol.cpp b/LUA_GdbModifyVol.cpp
index 85c7f8a..407decf 100644
--- a/LUA_GdbModifyVol.cpp
+++ b/LUA_GdbModifyVol.cpp
@@ -94,7 +94,7 @@ LuaVolZmapSetStdTool( lua_State* L)
    LuaGetParam( L, 7, nFlag) ;
    LuaClearStack( L) ;
   // imposto utensile standard a Zmap indicati
-   bool bOk = ExeVolZmapSetStdTool( vIds, sToolName, dLen, dDiam, dCornR, dCutterH, nFlag) ;
+   bool bOk = ExeVolZmapSetStdTool( vIds, sToolName, dLen, dDiam, dCornR, dCutterH, nFlag, true) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -125,7 +125,7 @@ LuaVolZmapSetAdvTool( lua_State* L)
    LuaGetParam( L, 9, nFlag) ;
    LuaClearStack( L) ;
   // imposto utensile avanzato a Zmap indicati
-   bool bOk = ExeVolZmapSetAdvTool( vIds, sToolName, dLen, dDiam, dTipLen, dTipDiam, dCornR, dCutterH, nFlag) ;
+   bool bOk = ExeVolZmapSetAdvTool( vIds, sToolName, dLen, dDiam, dTipLen, dTipDiam, dCornR, dCutterH, nFlag, true) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -154,7 +154,7 @@ LuaVolZmapSetSawTool( lua_State* L)
    LuaGetParam( L, 8, nFlag) ;
    LuaClearStack( L) ;
   // imposto utensile avanzato a Zmap indicati
-   bool bOk = ExeVolZmapSetSawTool( vIds, sToolName, dLen, dDiam, dThick, dStemDiam, dCornR, nFlag) ;
+   bool bOk = ExeVolZmapSetSawTool( vIds, sToolName, dLen, dDiam, dThick, dStemDiam, dCornR, nFlag, true) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -175,7 +175,7 @@ LuaVolZmapSetGenTool( lua_State* L)
    LuaGetParam( L, 4, nFlag) ;
    LuaClearStack( L) ;
   // imposto utensile generico a Zmap indicati
-   bool bOk = ExeVolZmapSetGenTool( vIds, sToolName, nToolSectId, nFlag) ;
+   bool bOk = ExeVolZmapSetGenTool( vIds, sToolName, nToolSectId, nFlag, true) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -202,7 +202,7 @@ LuaVolZmapSetMortiserTool( lua_State* L)
    LuaGetParam( L, 7, nFlag) ;
    LuaClearStack( L) ;
   // imposto mortasatrice a Zmap indicati
-   bool bOk = ExeVolZmapSetMortiserTool( vIds, sToolName, dLen, dWidth, dThick, dCornR, nFlag) ;
+   bool bOk = ExeVolZmapSetMortiserTool( vIds, sToolName, dLen, dWidth, dThick, dCornR, nFlag, true) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -227,7 +227,7 @@ LuaVolZmapSetChiselTool( lua_State* L)
    LuaGetParam( L, 6, nFlag) ;
    LuaClearStack( L) ;
   // imposto scalpello a Zmap indicati
-   bool bOk = ExeVolZmapSetChiselTool( vIds, sToolName, dLen, dWidth, dThick, nFlag) ;
+   bool bOk = ExeVolZmapSetChiselTool( vIds, sToolName, dLen, dWidth, dThick, nFlag, true) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;
@@ -242,7 +242,7 @@ LuaVolZmapResetTool( lua_State* L)
    LuaCheckParam( L, 1, vIds)
    LuaClearStack( L) ;
   // reset utensile a Zmap indicati
-   bool bOk = ExeVolZmapResetTool( vIds) ;
+   bool bOk = ExeVolZmapResetTools( vIds) ;
   // restituisco il risultato
    LuaSetParam( L, bOk) ;
    return 1 ;