void runRecoFOPI_MC_mb(TString digifile, int field, TString gas, int gain, int bfield,
		       unsigned int smoothing = 0, unsigned int nEvents = 5000, 
		       unsigned int nEvStart = 0,unsigned int outnum=0) {
  // ========================================================================
  // Verbosity level (0=quiet, 1=event level, 2=track level, 3=debug)
  Int_t iVerbose = 0;

  // Input file
  TString inDigiFile = digifile;
  TString inSimFile = inDigiFile;
  inSimFile.ReplaceAll("raw.root", "mc.root");
  // Parameter file
  TString parFile = inDigiFile;
  parFile.ReplaceAll("raw.root", "param.root");

  // Output file
  TString outFile = inDigiFile;
  outFile.ReplaceAll("raw.root","reco.root");
  if (outnum>0)
    outFile.ReplaceAll(".root",Form("_%i.root",outnum))

  // Number of events to process
  //  Int_t nEvents = 0;

  // ----  Load libraries   -------------------------------------------------
  TString basedir = gSystem->Getenv("VMCWORKDIR");
  // ------------------------------------------------------------------------
  // In general, the following parts need not be touched
  // ========================================================================

  // -----   Timer   --------------------------------------------------------
  TStopwatch timer;
  timer.Start();
  // ------------------------------------------------------------------------

  // -----   Digitization run   -------------------------------------------
  FairRunAna *fRun= new FairRunAna();
  fRun->SetInputFile(inDigiFile);
  cout<<"Set Input File: "<<inDigiFile<<endl;
  //  fRun->AddFriend(inSimFile);
  cout<<"Set Friend MC File: "<<inSimFile<<endl;
  fRun->SetOutputFile(outFile);
  cout<<"Set Output File: "<<outFile<<endl;
  //FairGeane *Geane = new FairGeane();
  //fRun->AddTask(Geane);
  // ------------------------------------------------------------------------

  // -----  Parameter database   --------------------------------------------
  //TString allDigiFile = sysFile+"/tpc/TestBench/tpc.TBtestChamber.par";
  cout<<"Create FairRuntimeDb"<<endl;
  FairRuntimeDb* rtdb = fRun->GetRuntimeDb();
  FairParAsciiFileIo* parInput1 = new FairParAsciiFileIo();
  TString tpcDigiFile = gSystem->Getenv("VMCWORKDIR");
  tpcDigiFile += "/tpc/FOPI/par/tpc.";
  tpcDigiFile += field;
  tpcDigiFile += gas;
  tpcDigiFile += gain;
  tpcDigiFile +="MC.par";
  parInput1->open(tpcDigiFile.Data(),"in"); 
  rtdb->setFirstInput(parInput1);
  

  // cout<<"Setting Geo File"<<endl;
  // TString geoFile =  gSystem->Getenv("VMCWORKDIR");
  // geoFile+="/geometry/tpc_prototype_ArCo2.root";
  // fRun->SetGeomFile(geoFile);
  TpcDigiPar* par = (TpcDigiPar*) rtdb->getContainer("TpcDigiPar");
  par->setInputVersion(fRun->GetRunId(),1);
  par->setChanged(kTRUE);
  par->init();
  Double_t taroff = -65;
  Double_t targetpos = taroff+41.;
  // possible materials: copper (default), lead, carbon
  TString targetmat = TString("carbon");
  TString alignmentFileName = par->getAlignmentFile();
  TString geoFile;
  geoFile.Form("$FOPI2ROOT/fopigeometry/FopiGeom_s339%5.1f.root",targetpos);

  TString cmd;
  cmd.Form(".! root -b -q '$FOPI2ROOT/fopigeometry/FopiGeom.C(%f,\"%s\",\"%s\",\"%s\",kFALSE)'",targetpos,targetmat.Data(),alignmentFileName.Data(),geoFile.Data());
  gROOT->ProcessLine(cmd);
  
  // add geometry file to fRun
  fRun->SetGeomFile(geoFile);

  cout<<"Setting Magnetic Field"<<endl;
  Double_t taroff = -65;
  Double_t targetpos = taroff+41.;
  FOPIField *fMagField = new FOPIField(0.616); 
  fMagField->SetTargetOffset(taroff);
  fRun->SetField(fMagField);

  //PndGeoHandling* geoH = PndGeoHandling::Instance();


  // ------- RECO procedure ------------------------------------------------
  //TString alifile = gSystem->Getenv("VMCWORKDIR");
  //alifile += "/tpc/FOPI/par/dummy_alignment.txt";
  //cout<<alifile.Data()<<endl;
  //TpcAlignmentManager * align = TpcAlignmentManager::getInstance(alifile);

  cout<<"Setting up ClusterFinderTAsk"<<endl;
  TpcClusterFinderTask* tpcCF = new TpcClusterFinderTask();
  tpcCF->SetDigiPersistence(); // keep reference to digis in clusters
  tpcCF->SetPersistence(); // keep Clusters
  tpcCF->timeslice(6); //in samples
  //tpcCF->SetThreshold(1);
  tpcCF->SetSingleDigiClusterAmpCut(15);
  tpcCF->SetClusterAmpCut(9.1); // cut on mean digi amplitude
  tpcCF->SetErrorPars(600.,400.);
  tpcCF->SetSimpleClustering(); // use TpcClusterFinderSimple
  fRun->AddTask(tpcCF);
  
  cout<<"Setting up Rieman Task"<<endl;
  //find TpcRiemannTracks in the TPC alone
  TpcRiemannTrackingTask* tpcSPR = new TpcRiemannTrackingTask();
  tpcSPR->SetClusterBranchName("TpcCluster");
  tpcSPR->SetPersistence();
  tpcSPR->SetSortingParameters(true,3,0);
  //tpcSPR->SetTrkFinderParameters(10,0.4,3,1);
  //tpcSPR->SetVerbose(1);
  fRun->AddTask(tpcSPR);

  cout<<"Setting up TrackInitTask"<<endl;
  //build GFTracks from TpcRiemannTracks
  TpcTrackInitTask* trackInit=new TpcTrackInitTask();
  trackInit->SetPersistence();
  trackInit->SetTrackOutBranchName("TpcTrackPreFit");
  trackInit->SetClusterBranchName("TpcCluster");
  trackInit->SetRecoHitOutBranchName("TpcSPHit");
  trackInit->SetCosmicSorting();
  trackInit->SetVerbose(1);
  trackInit->SetPDG(211);
  if (smoothing==1)
    trackInit->SetSmoothing(true);
  fRun->AddTask(trackInit);

  cout<<"Setting up AlignmentTask"<<endl;
  TpcAlignmentTask* align = new TpcAlignmentTask();
  align->SetRecoHitBranchName("TpcSPHit");
  fRun->AddTask(align);

  cout<<"Setting up KalmanTask"<<endl;
  KalmanTask* kalman =new KalmanTask();
  kalman->SetTpcClusterBranchName("TpcSPHit");
  kalman->SetTrackBranchName("TpcTrackPreFit");
  kalman->SetOutBranchName("TrackPostFit");
  kalman->SetPersistence();
  kalman->SetNumIterations(3); // number of fitting iterations (back and forth)
  fRun->AddTask(kalman);

  cout<<"Setting up ResidualTask"<<endl;
  TpcResidualTask* Res = new TpcResidualTask();
  Res->SetPersistence();
  Res->SetNumberOfTrackReps(1); // set to 2 if you use GeaneTrackrep (tpcSPR->useGeane();)
  if (smoothing==1)
    Res->SetUnbiased();
  fRun->AddTask(Res);

  // -----   Intialise and run   --------------------------------------------

  cout<<"Initialising run"<<endl;
  fRun->Init();
  // Initialize the Digimapper:
  TpcDigiPar* tpcpar = FairRun::Instance()->GetRuntimeDb()->getContainer("TpcDigiPar");
  TpcDigiMapper::getInstance()->init(tpcpar);
  //TpcDigiMapper::getInstance()->forceManualDriftVel(forceDriftVel);
  TpcAlignmentManager::init(tpcpar->getAlignmentFile());

  std::cout<<"Number of events to process:"<<nEvents<<std::endl;
  std::cout<<"post init"<<std::endl;
  fRun->Run(nEvStart, nEvents);

  rtdb->saveOutput();
  rtdb->print();

  // ------------------------------------------------------------------------

  // -----   Finish   -------------------------------------------------------

  timer.Stop();
  Double_t rtime = timer.RealTime();
  Double_t ctime = timer.CpuTime();
  cout << endl << endl;
  cout << "Macro finished succesfully." << endl;
  cout << "Output file is "    << outFile << endl;
  cout << "Parameter file is " << parFile << endl;
  cout << "Real time " << rtime << " s, CPU time " << ctime << " s" << endl;
  cout << endl;
  // ------------------------------------------------------------------------
  std::cout<<"OutputFile: "<<outFile<<std::endl;

}