Problem in HF Analysis

ypatley · December 1, 2022, 1:30pm

I am trying to run the tutorial from the following link…

AliceO2Group/analysis-tutorials/blob/master/o2at-1/h4/o2at-h4-1-skimming.cxx

// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright
// holders. All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
///
/// \brief This task contains the individual steps that are to be taken
///        in the first part of the tutorial. These are 6 steps, and at the end,
///        the participant is expected to have a pT resolution histogram
///        as a function of transverse momentum.
/// \author
/// \since

#include "Framework/runDataProcessing.h"
#include "Framework/AnalysisTask.h"

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I am able to compile it with ninja.
But when I am executing it in the directory with AO2D-HF.root, it is showing me the following error at last…
[ERROR] SEVERE: Device hf-track-index-skim-creator (46352) had at least one message above severity 4: Got nullptr from CCDB for path GLO/Config/GRPMagField and timestamp 1547167250113

Kindly help me with this !!!