diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index 539003b..5dce87a 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/MachineHeads.cpp b/MachineHeads.cpp
index d74f4d3..6556639 100644
--- a/MachineHeads.cpp
+++ b/MachineHeads.cpp
@@ -47,8 +47,11 @@ Machine::LoadTool( const string& sHead, int nExit, const string& sTool)
    if ( ! m_pMchMgr->TdbSetCurrTool( sTool)  ||  ! m_pMchMgr->TdbGetCurrToolParam( TPA_DRAW, sDraw))
       return false ;
    string sToolFile = m_sMachineDir + "\\" + TOOLS_DIR + "\\" + sDraw ;
-   if ( ! ExistsFile( sToolFile))
+   if ( ! ExistsFile( sToolFile)) {
+      string sOut = "Missing tool (" + sTool + ") draw : " + sToolFile ;
+      LOG_ERROR( GetEMkLogger(), sOut.c_str()) ;
       return false ;
+   }
   // pulisco il gruppo dell'uscita
    m_pGeomDB->EmptyGroup( nExGrp) ;
   // inserisco l'utensile nel gruppo
diff --git a/Sawing.cpp b/Sawing.cpp
index ec08308..a7a27c9 100644
--- a/Sawing.cpp
+++ b/Sawing.cpp
@@ -1048,28 +1048,32 @@ Sawing::ProcessEntity( const ICurve* pCrvP, const ICurve* pCrvC, const ICurve* p
    switch ( pCrvC->GetType()) {
    case CRV_LINE :
       {
-      const ICurveLine* pLine = GetCurveLine( pCrvC) ;
-      if ( pLine == nullptr)
-         return false ;
-      return ProcessLine( pCrvP, pLine, pCrvN, dDepth, dExtraCut, bIsFirst, bIsLast, sName, nPvId, nClId) ;
+         const ICurveLine* pLine = GetCurveLine( pCrvC) ;
+         if ( pLine == nullptr)
+            return false ;
+         return ProcessLine( pCrvP, pLine, pCrvN, dDepth, dExtraCut, bIsFirst, bIsLast, sName, nPvId, nClId) ;
       }
    case CRV_ARC :
-      {
-      const ICurveArc* pArc = GetCurveArc( pCrvC) ;
-      if ( pArc == nullptr)
-         return false ;
-     // verifico che non ci sia angolo di fianco
-      if ( abs( m_Params.m_dSideAngle) > EPS_ANG_SMALL) {
-         LOG_INFO( GetEMkLogger(), "Error in Sawing : SideAngle not allowed on Arc") ;
-         return false ;
+      if ( m_Params.m_nCurveUse == SAW_CRV_KEEP) {
+         const ICurveArc* pArc = GetCurveArc( pCrvC) ;
+         if ( pArc == nullptr)
+            return false ;
+        // verifico che non ci sia angolo di fianco
+         if ( abs( m_Params.m_dSideAngle) > EPS_ANG_SMALL) {
+            LOG_INFO( GetEMkLogger(), "Error in Sawing : SideAngle not allowed on Arc") ;
+            return false ;
+         }
+        // se arco lavorato dall'esterno
+         if ( ( pArc->GetAngCenter() > 0  &&  m_Params.m_nWorkSide == SAW_WS_RIGHT)  ||
+              ( pArc->GetAngCenter() < 0  &&  m_Params.m_nWorkSide == SAW_WS_LEFT))
+            return ProcessExtArc( pCrvP, pArc, pCrvN, dDepth, dExtraCut, bIsFirst, bIsLast, sName, nPvId, nClId) ;
+        // altrimenti arco lavorato dall'interno
+         else
+            return ProcessIntArc( pCrvP, pArc, pCrvN, dDepth, dExtraCut, bIsFirst, bIsLast, sName, nPvId, nClId) ;
       }
-     // se arco lavorato dall'esterno
-      if ( ( pArc->GetAngCenter() > 0  &&  m_Params.m_nWorkSide == SAW_WS_RIGHT)  ||
-           ( pArc->GetAngCenter() < 0  &&  m_Params.m_nWorkSide == SAW_WS_LEFT))
-         return ProcessExtArc( pCrvP, pArc, pCrvN, dDepth, dExtraCut, bIsFirst, bIsLast, sName, nPvId, nClId) ;
-     // altrimenti arco lavorato dall'interno
-      else
-         return ProcessIntArc( pCrvP, pArc, pCrvN, dDepth, dExtraCut, bIsFirst, bIsLast, sName, nPvId, nClId) ;
+      else {
+         LOG_INFO( GetEMkLogger(), "Warning in Sawing : Skipped Arc") ;
+         return true ;
       }
    default :
       return false ;
diff --git a/SawingData.h b/SawingData.h
index 8676e27..7771031 100644
--- a/SawingData.h
+++ b/SawingData.h
@@ -35,7 +35,7 @@ struct SawingData : public MachiningData
    int         m_nLeadInType ;     // tipo di attacco (interno, centro, fuori, esteso, esteso fuori)
    int         m_nExtLinkType ;    // tipo di collegamento su ang esterno ( centro, esteso prec, esteso succ, esteso minore)
    int         m_nLeadOutType ;    // tipo di uscita (interno, centro, esteso)
-   int         m_nCurveUse ;       // gestione delle curve(salta, approssima, convesso)
+   int         m_nCurveUse ;       // gestione delle curve(salta, approssima, convesso, fai)
    double      m_dApprox ;         // valore di approssimazione per curve
    std::string m_sSysNotes ;       // note interne
    std::string m_sUserNotes ;      // note dell'utente