NEW_DATA

        [LAS\]NEW_DATA [Interval]

    Waits  until  new  observations have been written to the input file, and
    then return. No modification of the input or current index is  done.  It
    is then expected to use FIND NEW_DATA|UPDATE to rebuild the indexes with
    these new observations (see corresponding HELP for details).

    The waiting time between 2 check can be customized as first argument (in
    seconds, default 5).