Check that the first argument to dbinfo() is a quoted string that corresponds to one of the following values: 'dbspace', 'version', 'sqlca.sqlerrd1', 'sqlca.sqlerrd2', 'sessionid', 'coserverid', 'utc_to_datetime', 'utc_current', 'get_tz', or 'dbhostname'.
-728 Unknown first argument of dbinfo argument-name.
The valid arguments to the dbinfo() function are the quoted string 'dbspace' followed by the number of a valid tablespace, or one of the following two values: 'sqlca.sqlerrd1' or 'sqlca.sqlerrd2'. Check that you supplied one of these values and enclosed the string in quotes.