a severe error was detected

  Explanation:  A severe error was detected by RDO and returned to
  DCL during the execution of an RDO statement.

  User  Action:   If  possible,  run  the  statement(s)  again  in
  interactive  RDO  and  read any additional RDO error messages to
  determine what caused the severe error condition.  Then fix  the
  error.   Remember,  in  a  DCL  command procedure containing RDO
  statements, use the $SEVERITY symbol to test for RDO$_SEVERRDET.