diff --git a/MachineLuaCL.cpp b/MachineLuaCL.cpp
index a48c329..72f7e10 100644
--- a/MachineLuaCL.cpp
+++ b/MachineLuaCL.cpp
@@ -313,6 +313,8 @@ Machine::LuaEmtAddClimb( lua_State* L)
    Operation* pOper = GetOperation( m_pMchLua->m_pGeomDB->GetUserObj( nMachId)) ;
   // imposto la discesa (primo movimento del primo percorso della lavorazione)
    bool bOk = ( pOper != nullptr && pOper->AddSpecialClimb( vAxVal, ( nMask >= 0), GDB_ID_NULL, nFlag, nFlag2, nMask, sInfo, false)) ;
+   if ( ! bOk)
+      return luaL_error( L, " Error in EmtAddClimb") ;
    LuaSetParam( L, bOk) ;
 
    return 1 ;
@@ -365,6 +367,8 @@ Machine::LuaEmtAddRise( lua_State* L)
    Operation* pOper = GetOperation( m_pMchLua->m_pGeomDB->GetUserObj( nMachId)) ;
   // aggiungo la risalita (ultimo movimento dell'ultimo percorso della lavorazione)
    bool bOk = ( pOper != nullptr && pOper->AddSpecialRise( vAxVal, ( nMask >= 0), GDB_ID_NULL, nFlag, nFlag2, nMask, sInfo)) ;
+   if ( ! bOk)
+      return luaL_error( L, " Error in EmtAddRise") ;
    LuaSetParam( L, bOk) ;
 
    return 1 ;
diff --git a/Operation.cpp b/Operation.cpp
index ef77197..af687f6 100644
--- a/Operation.cpp
+++ b/Operation.cpp
@@ -3464,14 +3464,11 @@ Operation::ManageSpecialLink( Operation* pPrevOpe, int nPrevClPathId, Operation*
 
   // in caso di errore eseguo inserimento con segnalazione di errore
    if ( ! bOk) {
-      if ( pPrevOpe != nullptr) {
-         if ( ! pPrevOpe->AddSpecialRise( vAxSta, false))
-            return false ;
-      }
-      if ( pNextOpe != nullptr) {
-         if ( ! pNextOpe->AddSpecialClimb( vAxEnd, false))
-            return false ;
-      }
+      if ( pPrevOpe != nullptr)
+         pPrevOpe->AddSpecialRise( vAxSta, false) ;
+      if ( pNextOpe != nullptr)
+         pNextOpe->AddSpecialClimb( vAxEnd, false) ;
+      return false ;
    }
 
    return true ;
@@ -3895,6 +3892,14 @@ Operation::AddSpecialClimb( const DBLVECTOR& vAxVal, bool bOk, int nClPathId,
    CamData* pCamData = GetCamData( m_pGeomDB->GetUserObj( nEntId)) ;
    if ( pCamData == nullptr)
       return false ;
+  // verifico che il numero di valori sia corretto
+   int nValCnt = int( vAxVal.size()) ;
+   int nAxesCnt = int( pCamData->GetAxesVal().size()) ;
+   if ( nValCnt != nAxesCnt) {
+      string sOut = "Error : " + ToString( nValCnt) + " values vs " + ToString( nAxesCnt) + " axes" ;
+      LOG_ERROR( GetEMkLogger(), sOut.c_str())
+      return false ;
+   }
   // creo oggetto punto per DB geometrico
    PtrOwner<IGeoPoint3d> pGP( CreateGeoPoint3d()) ;
    if ( IsNull( pGP))
@@ -4163,6 +4168,14 @@ Operation::AddSpecialRise( const DBLVECTOR& vAxVal, bool bOk, int nClPathId,
    CamData* pCamData = GetCamData( m_pGeomDB->GetUserObj( nEntId)) ;
    if ( pCamData == nullptr)
       return false ;
+  // verifico che il numero di valori sia corretto
+   int nValCnt = int( vAxVal.size()) ;
+   int nAxesCnt = int( pCamData->GetAxesVal().size()) ;
+   if ( nValCnt != nAxesCnt) {
+      string sOut = "Error : " + ToString( nValCnt) + " values vs " + ToString( nAxesCnt) + " axes" ;
+      LOG_ERROR( GetEMkLogger(), sOut.c_str())
+      return false ;
+   }
   // creo oggetto punto per DB geometrico
    PtrOwner<IGeoPoint3d> pGP( CreateGeoPoint3d()) ;
    if ( IsNull( pGP))