pdp++_2.0b3_ivinc.tar.gz -- corrupted?

[Marco Capozza <m.cap@galactica.it>]

Hello.
Maybe 'pdp++_2.0b3_ivinc.tar.gz' file to download form
'ftp://grey.colorado.edu/pub/oreilly/pdp++/' is corrupted?
It is 45 bytes only, and it gives an 'Invalid archive directory' message
when opened.
Thank you.