diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index 24aa3ee..1ebc413 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/MachMgr.h b/MachMgr.h
index 9839507..057033f 100644
--- a/MachMgr.h
+++ b/MachMgr.h
@@ -316,12 +316,12 @@ class MachMgr : public IMachMgr
                           int& nStat, DBLVECTOR& vAng1, DBLVECTOR& vAng2) const ;
       bool GetCalcPositions( const Point3d& ptP, double dAngA, double dAngB,
                              int& nStat, double& dX, double& dY, double& dZ) const override ;
-      bool GetCalcPositions( const Point3d& ptP, DBLVECTOR& vAng,
-                             int& nStat, double& dX, double& dY, double& dZ) const ;
+      bool GetCalcPositions( const Point3d& ptP, const DBLVECTOR& vAng,
+                             int& nStat, double& dX, double& dY, double& dZ) const override ;
       bool GetCalcTipFromPositions( double dX, double dY, double dZ, double dAngA, double dAngB,
                                     bool bOverall, bool bBottom, Point3d& ptTip) const override ;
       bool GetCalcTipFromPositions( double dX, double dY, double dZ, const DBLVECTOR& vAng,
-                                    bool bOverall, bool bBottom, Point3d& ptTip) const ;
+                                    bool bOverall, bool bBottom, Point3d& ptTip) const override ;
       bool GetCalcToolDirFromAngles( const DBLVECTOR& vAng, Vector3d& vtDir) const override ;
       bool GetCalcAuxDirFromAngles( const DBLVECTOR& vAng, Vector3d& vtDir) const override ;
       bool GetNearestAngleInStroke( int nInd, double dAngRef, double& dAng) const override ;
diff --git a/MachMgrMachines.cpp b/MachMgrMachines.cpp
index e2a3e37..0f17c74 100644
--- a/MachMgrMachines.cpp
+++ b/MachMgrMachines.cpp
@@ -599,13 +599,14 @@ bool
 MachMgr::GetCalcPositions( const Point3d& ptP, double dAngA, double dAngB,
                            int& nStat, double& dX, double& dY, double& dZ) const
 {
+   DBLVECTOR vAng( 2) ; vAng[0] = dAngA ; vAng[1] = dAngB ;
    Machine* pMch = GetCurrMachine() ;
-   return ( ( pMch != nullptr) ? pMch->GetPositions( ptP, dAngA, dAngB, nStat, dX, dY, dZ) : false) ;
+   return ( ( pMch != nullptr) ? pMch->GetPositions( ptP, vAng, nStat, dX, dY, dZ) : false) ;
 }
 
 //----------------------------------------------------------------------------
 bool
-MachMgr::GetCalcPositions( const Point3d& ptP, DBLVECTOR& vAng,
+MachMgr::GetCalcPositions( const Point3d& ptP, const DBLVECTOR& vAng,
                            int& nStat, double& dX, double& dY, double& dZ) const
 {
    Machine* pMch = GetCurrMachine() ;
diff --git a/Machine.h b/Machine.h
index c595673..9f40508 100644
--- a/Machine.h
+++ b/Machine.h
@@ -121,8 +121,6 @@ class Machine
                       int& nStat, double& dAngA1, double& dAngB1, double& dAngA2, double& dAngB2) const ;
       bool GetAngles( const Vector3d& vtDirT, const Vector3d& vtDirA,
                       int& nStat, DBLVECTOR& vAng1, DBLVECTOR& vAng2) const ;
-      bool GetPositions( const Point3d& ptP, double dA, double dB,
-                         int& nStat, double& dX, double& dY, double& dZ) const ;
       bool GetPositions( const Point3d& ptP, const DBLVECTOR& vAng,
                          int& nStat, double& dX, double& dY, double& dZ) const ;
       bool GetHeadOffsetDelta( const DBLVECTOR& vAng,
diff --git a/MachineCalc.cpp b/MachineCalc.cpp
index b139aeb..3c13a17 100644
--- a/MachineCalc.cpp
+++ b/MachineCalc.cpp
@@ -968,15 +968,6 @@ Machine::GetMyAngles( const Vector3d& vtDirT, const Vector3d& vtDirA,
    return true ;
 }
 
-//----------------------------------------------------------------------------
-bool
-Machine::GetPositions( const Point3d& ptP, double dAngA, double dAngB,
-                       int& nStat, double& dX, double& dY, double& dZ) const
-{
-   DBLVECTOR vAng( 2) ; vAng[0] = dAngA ; vAng[1] = dAngB ;
-   return GetPositions( ptP, vAng, nStat, dX, dY, dZ) ;
-}
-
 //----------------------------------------------------------------------------
 bool
 Machine::GetPositions( const Point3d& ptP, const DBLVECTOR& vAng,
@@ -985,6 +976,10 @@ Machine::GetPositions( const Point3d& ptP, const DBLVECTOR& vAng,
   // la posizione deve essere espressa rispetto allo ZERO MACCHINA
   // il punto è dato rispetto alla posizione home della tavola
 
+  // verifico che siano stati assegnati gli angoli necessari, altrimenti errore
+   if ( vAng.size() < m_vCalcRotAx.size())
+      return false ;
+
   // aggiorno punto di lavoro mediante ciclo diretto sugli assi di tavola
    Point3d ptW = ptP ;
    // annullo la posizione home degli assi lineari
@@ -1037,6 +1032,10 @@ Machine::GetHeadOffsetDelta( const DBLVECTOR& vAng,
 {
   // ovviamente tutto è espresso nel riferimento ZERO MACCHINA
 
+  // verifico che siano stati assegnati gli angoli necessari, altrimenti errore
+   if ( vAng.size() < m_vCalcRotAx.size())
+      return false ;
+
   // aggiorno posizione e direzione fresa su testa a riposo mediante ciclo inverso sugli assi di testa
    Point3d  ptPosH = m_ptCalcPos ;
    Vector3d vtDirH = m_vtCalcDir ;