LEARN_ABORT
     Causes a learn sequence being replayed to stop.
  Syntax
     [integer] := LEARN_ABORT
  Parameters
     None
  Comments
     The integer returned indicates whether a learn sequence was aborted.
     The built-in returns 1 if a learn sequence was being replayed, 0
     otherwise.
  Example
     In the following error handler, if an error occurs, any executing learn
     sequences are aborted.
     ON_ERROR
         MESSAGE ("Aborting command because of error.");
         LEARN_ABORT;
         ABORT;
     ENDON_ERROR;
  Related Topics
     ABORT