invalid operation for storage map "<str>"

  Explanation:   The  storage  map  you  attempted  alter   is   a
  vertically partitioned map which currently may not be altered in
  this release of Rdb.

  User Action:  To change  the  characteristic  for  a  vertically
  partitioned  map  you  will  need to unload the data, delete the
  data  (or  drop   the   table)   and   redefine   the   physical
  characteristics.