"by page" RESTORE of an AIP (area inventory page) was attempted

  Explanation:  Corruptions in the AIP (area  inventory)  may  not
  always be correctable using a "by page" RESTORE operation.

  User Action:  Use the RMU Verify command to verify the database.
  If  the "by page" restore operation was not effective, perform a
  "by area" restore of the entire RDB$SYSTEM storage area.