the transaction option "<str>" is not allowed

  Explanation:  A  transaction  mode  was  specified  on  the  SET
  TRANSACTION  (SQL) (or RDO START_TRANSACTION) statement which is
  currently not  allowed  for  this  database.   These  modes  are
  established  using  the SET or ALTER TRANSACTION MODES clause on
  CREATE and ALTER DATABASE.

  User Action:  Use the SHOW DATABASE statement in SQL to  examine
  the  enabled  modes  for  this  database  and  change  your  set
  transaction accordingly.  Or, have  the  database  administrator
  modify  the  database-wide settings to allow this transaction to
  be executed.