cannot optimize -- AIJ file <str>  had  its  previous  AIJ  file
  backed up via a no-quiet-point backup

  Explanation:  An AIJ file for which the previous  AIJ  file  was
  backed  up with a no-quiet-point backup, cannot be optimized.  A
  no-quiet-point backup can leave incomplete  transactions  in  an
  AIJ   file,   and  AIJ  optimization  cannot  handle  incomplete
  transactions within an AIJ file.

  User Action:  No user action is required.  This AIJ file  cannot
  be optimized.