Looking at your screen shot it does not appear promising. The Masters folder as well as the Previews, Thumbnails and others are reporting there size as 0 bytes, basically empty. Were the masters in this library referenced?
You say this is a library from 2009 but that it was a 3.4.5 library, how can that be? 3.4.5 is a fairly recent release. Did you open and upgrade this library at some point before trying to open it now?
Message was edited by: Frank Caggiano - BTW is this related to your other thread on the library size discrepancy between copied Aperture libraries?