008D9992 Illegal operation for relational view source <...>.

    Explanation:

    An operation that requires a relational database key, such as
    an operation referring to a collection or to a MODIFY or DELETE
    statement, can not be executed because the source is a relational
    view that is not based on physical records in the database. Such
    views include the following:

    o  Views defined using the SQL/Services interface to Oracle Rdb
       that include GROUP BY or UNION clauses

    o  Views defined using either the Relational Database Operator
       (RDO) or SQL/Services that include functions like SUM

    User Action:

    To avoid error messages, you should not perform these statements
    when you are referring to a relational view that is not based on
    a physical record source.