{
  #include <string>  // Needed for ROOT 3.10.

  // Load the dataset and DIAL libraries.
  gROOT->ProcessLine(".X load_dial.cxx+");

  // Load the macro for opening HBOOK files.
  gROOT->LoadMacro("open_hbook.C");

  // Define location of Unique ID generator files.
  string dial_uids = Environment::current().value("DIAL_UIDS");
  UniqueIdGenerator::base_directory(dial_uids);

  // Instantiate the dataset database (DDB).
  dset::DatasetDb& ddb = *dset::DatasetDb::default_instance();

  // Create scheduler.
  dial::ProcessJobCreator cre;
  bool remove_jobs = false;
  dial::LocalScheduler lsch(cre, remove_jobs);
  dial::Scheduler& msch = lsch;

  // Load test script.
  gROOT->LoadMacro("test.C");

  // Define global job ID.
  dial::JobId jid;

  // Welcome message.
  cout << "Welcome to DIAL demo 1" << endl;
  cout << "See README for instructions" << endl;
  cout << "  To start job: root> test(\"dial_cbnt\")" << endl;
  cout << "  To fetch job: root> dial::Job& job = lsch.job(jid);" << endl;
  cout << "  To display job: root> job.update(); cout << job << endl << endl;" << endl;
  cout << "  To fetch results: root> open_hbook()" << endl;
  cout << "Questions or problems to dladams@bnl.gov" << endl;

  // Check the job ID generator.
  if ( dial::JobId::generator() == 0 ||
       ! dial::JobId::generator()->is_global() ) {
    cout << "Job ID generator is absent or local"  << endl;
    cout << "Please resolve problem before job submission" << endl;
  }

  // Check the dataset ID generator.
  if ( ! dset::BaseDataset::id_generator().is_valid() ||
       ! dset::BaseDataset::id_generator()->is_global() ) {
    cout << "Dataset ID generator is invalid or local"  << endl;
    cout << "Please resolve problem before job submission" << endl;
  }

  // Check the task ID generator.
  if ( ! dial::Task::generator().is_valid() ||
       ! dial::Task::generator()->is_global() ) {
    cout << "Task ID generator is invalid or local"  << endl;
    cout << "Please resolve problem before creating tasks" << endl;
  }
}