This sounds really familiar, but it has probably been close to 15 years for me and it was real hardware. My /73 has a DEC TLZ06 4mm and a TZ30 (TK50). I installed the OS from 4mm, but had to install the at least one layered product from TK50. I would recommend that you switch your tape drive type to TMSCP, and give that a try. Zane On Oct 13, 2026, at 7:04 PM, Peter Ekstrom &lt;epekstrom(a)gmail.com&gt; wrote:  Hi Zane, It is a simulated one, to be completely honest. :) I am using the TS05 drive and I can restore the auto-installer, and I can get the directory of the tape, as well as the backup sets. It's just when I try to install CCC that it fails. It seems to look for something under [1,2] but I don't know what. And sometimes it just says something is corrupt. - Peter On Tue, Oct 13, 2026 at 9:57 PM Zane Healy &lt;healyzh(a)avanthar.com&gt; wrote: > What type of tape drive? I seem to recall the layered products being > pickier than the OS. Real HW or emulsion? > > Zane > > > > > > On Oct 13, 2026, at 6:48 PM, Peter Ekstrom via cctalk < > cctalk(a)classiccmp.org&gt; wrote: > > > > Hi all, > > > > So I have started playing around with RSTS/E v10.1 on one of my PDP-11s > and > > I am trying > > to install PDP11-C v1.2. I have the auto-installer in [82,6] and the > tape > > mounted but it fails: > > > > $ @[82,6]autoin > > RSTS/E Auto-Install Procedure V1.1 > > > > 18-Oct-26 01:47 AM > > > > Type "?" for help; CTRL/Z to end; or valid input. > > > > Which product(s) do you want to install? ccc > > > > Type "?" for help; CTRL/Z to exit Auto-Install; or valid input. > > > > Where are the update files located <PATCH$:>? > > > > Type "?" for help; CTRL/Z to skip this product; or valid input. > > > > Which device are the distribution files for CCC (CCC) located on > (include > > colon) > > ? ms0: > > > > Products being installed: > > Device Product Task name > > ------ ------- --------- > > MS0: CCC (CCC) > > > > Determining system configuration. > > > > FATAL -- Auto-Install internal data structure corrupted; procedure > > aborting. > > > > Auto-Install ended at 18-Oct-26 01:47 AM. > > > > > > I don't have the documentation for C for RSTS/E so, what am I missing? > > Following this exact same process in RSX-11M+ works fine with the media > for > > RSX. > > > > I have the RSTS/E manuals, just not the ones for the layered products. > > > > Thanks in advance for any help or pointers. > > > > - Peter > >