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.