008D8AA2 Source cannot be readied at this access mode unless a
    COMMIT, ROLLBACK, or FINISH is issued.

    Explanation:

    You readied and accessed a Oracle CODASYL DBMS domain or Oracle
    CODASYL DBMS database. You then attempted to ready, under a more
    restrictive access mode, another domain or database that referred
    to records in the same Oracle CODASYL DBMS realm:

    o  A second Oracle CODASYL DBMS domain that referred to another
       record in the same realm as the first domain

    o  The same database using a different record in the same realm

    User Action:

    Issue a COMMIT, ROLLBACK, or FINISH command. Ready the domain or
    database under the desired access mode.