message: error if not using a file per process
diff: @@ -173,10 +173,8 @@ void IOManager::write(sidre::Group* datagroup, int num_files,
  m_baton = new IOBaton(m_mpi_comm, num_files, m_comm_size);
  }
  - if (m_use_scr && num_files != m_comm_size)
  - {
  - SLIC_WARNING("SCR requires a file per process");
  - }
  + SLIC_ERROR_IF(m_use_scr && num_files != m_comm_size,
  + "SCR requires a file per process");
  std::string root_string = file_string;
  if (m_my_rank == 0)
  