void AliTOFhits2sdigits(Int_t firstEvent=0,Int_t nEvents=1) 
{

  /////////////////////////////////////////////////////////////////////////
  //
  // Creates TOF summable digits from the hit information. 
  //
  // Report problems to pierella@bo.infn.it
  //
  // Use case:
  // start root
  // // load the macro
  // root[0] .L AliTOFhits2sdigits.C
  // root[1] AliTOFhits2sdigits()
  //
  // Updated to the new I/O: C. Zampolli
  //
  /////////////////////////////////////////////////////////////////////////

  // Dynamically link some shared libs

  if (gClassTable->GetID("AliRun") < 0) {
    gROOT->LoadMacro("loadlibs.C");
    loadlibs();
    cout << "Loaded shared libraries" << endl;
  } 
  
  if (gAlice)
    {
      delete gAlice->GetRunLoader();
      delete gAlice;
      gAlice = 0x0;
    }
  
  // Create the TOF sdigitzer and sdigitize by default the first event
  // (in fact by default Int_t firstEvent=0,Int_t nEvents=1)
  AliTOFSDigitizer *sdigitizer = new AliTOFSDigitizer("galice.root",firstEvent,nEvents); // it is the same nevents numbering

  // Activate this line if you want to print the parameters
  // used in sdigitization
  // sdigitizer->PrintParameters();

  // e.g. Activate this line if you want to sdigitize only hits from plate 3
  // in sector 15
  // pay attention that sector must be in the range [0,17]
  //                and plate  must be in the range [0,4]
  // by default we sdigitize hits of all plates in all sectors
  // sdigitizer->SelectSectorAndPlate(15,3);


  // performs sdigitization of the above events with "all" verbose option
  // "tim" option is also available for benchmarking only
  //sdigitizer->Exec("all");  

  // N.B.: in order to maintain the functionality to sdigitize 
  // all events in current file add a second option
   sdigitizer->Exec("all","all");
  // the second "all" option overrides the previous settings for 
  // lower and upper  bounds for event to sdigitize and allow
  // the sdigitization for ALL events in fileNameHits

   sdigitizer = 0x0;
   delete sdigitizer;
   
   if (gAlice)
     {
       delete gAlice->GetRunLoader();
       delete gAlice;
       gAlice = 0x0;
     }
   
}