void
Hits2SDigits()
{
  AliCDBManager::Instance()->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
  AliCDBManager::Instance()->SetRun(0);
  
  AliRunLoader* runLoader = AliRunLoader::Open("galice.root", "Alice", "read");
  if (!runLoader) {
    AliError("Coulnd't read the file galice.root");
    return;
  }
  
  if  (runLoader->LoadgAlice()) return;
  AliRun* run = runLoader->GetAliRun();
  
  // Get the FMD 
  AliFMD* fmd = static_cast<AliFMD*>(run->GetDetector("FMD"));
  if (!fmd) {
    AliError("Failed to get detector FMD from loader");
    return;
  }
  
  // Get the FMD loader
  AliLoader* loader = runLoader->GetLoader("FMDLoader");
  if (!loader) {
    AliError("Failed to get detector FMD loader from loader");
    return;
  }
  if (runLoader->LoadHeader()) { 
    AliError("Failed to get event header information from loader");
    return;
  }
  TTree* treeE = runLoader->TreeE();
  
  AliLog::SetModuleDebugLevel("FMD", 1);

  fmd->Hits2SDigits();
}