Hi @jcardo,
During an installation, the OMP installation files are not verified or modified. In the past we’ve had a couple of reports that 7zip does not handle symbolic links inside the archive properly – see e.g. Problems Upgrading to Version 2.4.6 - #10 by asmecher. That’s consistent with the behaviour you’re seeing, where MonographONIX30XmlFilter.inc.php appears to be empty. You could try using Winzip or tar instead.
Regards,
Alec Smecher
Public Knowledge Project Team