HELPLIB.HLB  —  RDML72  RDML_ERRORS, MODREDUCE
  SQL does not allow <str> on reduced streams

  Explanation:  You have used MODIFY or ERASE on  a  stream  whose
  record  selection  expression contains a REDUCED TO clause.  SQL
  does not permit its equivalent  of  MODIFY  (UPDATE)  and  ERASE
  (DELETE)  to  operate  on  these streams as these are considered
  read only.

  User Action:  Rewrite your code so it does not attempt to modify
  or erase from these relations.
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