#ifndef __CINT__
  #include <Riostream.h>
  #include "AliITStrackerV2.h"

  #include "TFile.h"
  #include "TStopwatch.h"
#endif

Int_t AliITSPropagateBackV2() {
   cerr<<"Propagating tracks back through the ITS...\n";

   TFile *in=TFile::Open("AliITStracksV2.root");
   if (!in->IsOpen()) {cerr<<"Can't open AliITStracksV2.root !\n"; return 1;}

   TFile *out=TFile::Open("AliTPCtracks.root","update");
   if (!out->IsOpen()) {
      cerr<<"Can't open AliTPCtracks.root !\n"; return 2;
   }
   TFile *file=TFile::Open("AliITSclustersV2.root");
   if (!file->IsOpen()) {
      cerr<<"Can't open AliITSclustersV2.root !\n";return 3;
   }
   AliITSgeom *geom=(AliITSgeom*)file->Get("AliITSgeom");

   TStopwatch timer;
   AliITStrackerV2 tracker(geom);
   Int_t rc=tracker.PropagateBack(in,out);
   timer.Stop(); timer.Print();

   file->Close();
   in->Close();
   out->Close();

   return rc;
}