I just recreated the  V72Install.tap  from the existing tape
files, included TTDVR.MAC and the ERR.ERR file from the V7.0
distribution.  I presume the ERR.ERR files were probably the
same, at least it is as close to the original distribution
as I can get.

I originally acquired the V7.2 distribution long after I was
working on a version 8 system.   The tape had errors and was
not a bootable system, but that didn't matter to me as I was
only interested in extracting the "NAMED" directory routines
that DEC had experimented with (in V7.2) and never finished.

Very shortly after I received the V7.2 tape, we upgraded our
system to version 9, and I found a much easier way to create
a workable user naming system.