Explanations and suggested user actions about errors returned by
    the RDML preprocessor are available online in three forms:

    o  Under the topic RDML_ERRORS

    o  In the file SYS$HELP:RDML_MSG.DOC that contains message
       information specific to the RDML preprocessor. You can TYPE,
       PRINT, or SEARCH this file for detailed information.

    o  In the file SYS$HELP:RDB_MSG.DOC that contains message
       information for errors that may be encountered during
       application execution.