The specified BLOCKS_PER_PAGE value would cause an illegal clump
  page count for storage area <str>

  Explanation:  The  SPAM  clump  page  count  multiplied  by  the
  specified  BLOCKS_PER_PAGE  value  would  be  greater  than  the
  maximum of 64 blocks.  For  uniform  storage  areas,  if  a  new
  blocks_per_page value is specified RMU/RESTORE cannot change the
  clump page count of the backup up database.

  User Action:  Repeat the  restore  with  a  new  BLOCKS_PER_PAGE
  value or without changing the BLOCKS_PER_PAGE value.