mp_file_read_at_all_z Subroutine

      SUBROUTINE mp_file_read_at_all_z (fh, offset, msg)
         COMPLEX(kind=real_8), INTENT(OUT)                     :: msg
         TYPE(mp_file_type), INTENT(IN)             :: fh
         INTEGER(kind=file_offset), INTENT(IN)      :: offset

#if defined(__parallel)
         CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_file_read_at_all_z'

         INTEGER                                    :: ierr

         ierr = 0
         CALL MPI_FILE_READ_AT_ALL(fh%handle, offset, msg, 1, MPI_DOUBLE_COMPLEX, MPI_STATUS_IGNORE, ierr)
         IF (ierr .NE. 0) &
            DBCSR_ABORT("mpi_file_read_at_all_z @ "//routineN)
#else
         READ (UNIT=fh%handle, POS=offset + 1) msg
#endif
      END SUBROUTINE mp_file_read_at_all_z