the table/subquery nesting levels in the query  outline  do  not
  match the query

  Explanation:  The subquery hierarchy of the query  outline  does
  not  match  the  subquery hierarchy of the query.  Subqueries or
  tables can be omitted from  the  query  outline,  but  for  each
  subquery that is present, all containing subqueries must also be
  present.

  User  Action:   Edit  the   query   outline   to   correct   the
  inconsistency,  or  regenerate  a  new  outline  by  running the
  optimizer.  Then make  the  desired  modifications  to  the  new
  outline.