compressed IKEY for index "<str>" exceeds 255 bytes

  Explanation:  The current index key (IKEY)  being  stored  in  a
  sorted or hashed index with compression enabled has exceeded the
  255-byte  IKEY-length  limit  during  compression.   With   IKEY
  compression  enabled,  some  IKEYs may actually increase in size
  during compression and potentially exceed the 255-byte limit.

  User Action:  Refer to your reference documention for details on
  controlling   the   maximum   expansion   overhead  during  IKEY
  compression.  Alternatively, recreate the specified  index  with
  compression disabled.