diff --git a/EgtMachKernel.rc b/EgtMachKernel.rc
index e3165a0..8df702e 100644
Binary files a/EgtMachKernel.rc and b/EgtMachKernel.rc differ
diff --git a/MachiningsMgr.cpp b/MachiningsMgr.cpp
index e0c746b..56e918b 100644
--- a/MachiningsMgr.cpp
+++ b/MachiningsMgr.cpp
@@ -512,14 +512,20 @@ MachiningsMgr::SaveOneMachining( const EgtUUID& Uuid, int& nCounter, Writer& The
    if ( iIter == m_umData.end())
       return false ;
    const MachiningData* pmData = iIter->second ;
+  // preparo la lista dei dati (quelli vuoti sono opzionali con default)
+   STRVECTOR vsOut ;
+   for ( int i = 0 ; i < pmData->GetSize() ; ++ i) {
+      string sOut = pmData->ToString( i) ;
+      if ( ! sOut.empty())
+         vsOut.emplace_back( sOut) ;
+   }
   // scrivo i dati della lavorazione
    string sOut = "[" + pmData->GetTitle() + "_" + ToString( ++ nCounter, 3) + "]" ;
    bool bOk = TheWriter.OutText( sOut) ;
-   sOut = MF_SIZE + "=" + ToString( pmData->GetSize()) ;
+   sOut = MF_SIZE + "=" + ToString( int( vsOut.size())) ;
    bOk = bOk && TheWriter.OutText( sOut) ;
-   for ( int i = 0 ; i < pmData->GetSize() ; ++ i) {
-      string sOut = pmData->ToString( i) ;
-      bOk = bOk && ! sOut.empty() && TheWriter.OutText( sOut) ;
+   for ( const auto& sOut : vsOut) {
+      bOk = bOk && TheWriter.OutText( sOut) ;
    }
    return bOk ;
 }