RDBPRE is a preprocessor for BASIC, COBOL, and FORTRAN programs
    that contain embedded RDO data manipulation statements. Each RDO
    statement is flagged by the special &RDB& flag.

    Because the RDBPRE preprocessor submits your source program to
    the appropriate host language compiler and creates an object
    file, you should never submit the output from the RDBPRE
    preprocessor to a host language compiler.

    When you create the source BASIC, COBOL, or FORTRAN program
    files, use the RDBPRE preprocessor default input file types.
    See the subtopic "Default_file_types" for a table that shows the
    RDBPRE default input file types and the output file types.