/EXCEPTION_FILE=file-spec

    By default, failures are only written to SYS$ERROR. Failures can
    also be reported to an exception file. The name of the exception
    file is given with the /EXCEPTION_FILE qualifier. The file will
    only be created should a failure occur; the file will have the
    protection mask (S:RWED,O:RWED,G,W). For each account whose
    migration fails, an entry will be made to the exception file. The
    entry takes the form of one or more lines of comments followed by
    a line containing the failed username and any optional password
    and destination username. The format of the exception file is
    such that it can be re-used as an input file.