You must specify /ERROR_LOG/ELV to access the Error Log Viewer
    (ELV). This utility is used with error logs written on systems
    running OpenVMS Version 7.3 and later.

    /ERROR_LOG (without /ELV) invokes the Error Log Report Formatter
    (ERF), a utility that is no longer supported, but which may be
    useful for error logs written on systems running OpenVMS versions
    older than Version 7.2. (It is available only on Alpha and VAX
    systems.) For documentation about ERF, refer to the Freeware
    website:

             http://h71000.www7.hp.com/openvms/freeware/

    Before using ERF, you must convert error log files using ELV or the
    Binary Error Log Translation utility, which is part of DECevent.
    DECevent is no longer supported, but those who need it can download
    the software and related documentation from the Freeware website:

             http://h71000.www7.hp.com/openvms/freeware/