wrong incremental backup.  Last full  backup  of  <str>  was  at
  <time>, not <time>

  Explanation:  This incremental backup file was created against a
  full  backup  of  the  area  that is different from the one that
  restored the area.

  User Action:  Either this incremental  backup  file  is  out  of
  date,  or you must restore the full backup that this incremental
  backup was generated against.