[Simh] vax780 and Process PTE in P0 or P1 space, PC: 80007E43 (XORW3 @-7035(AP), @D0FD2A4A, @-70B0(R1))

[Jeremy C. Reed]

I am trying to use simh-vax780 from simh 3.8-0 and 3.8-1 on NetBSD/i386 
to boot historical 4.0BSD:
http://zazie.tom-yam.or.jp/starunix/4.0bsd/4.0bsd.html
or
http://sourceforge.net/project/shownotes.php?release_id=659765

See the error below:

t1:vax780$ simh-vax780 tboot.init    

VAX780 simulator V3.8-1
RP: creating new file
Overwrite last track? [N] y

HALT instruction, PC: 00050033 (HALT)
=mkfs
file sys size: 7942
file system: hp(0,0)
isize = 5072
m/n = 3 500
=restor
Tape? ht(0,1)
Disk? hp(0,0)
Last chance before scribbling on disk. 
End of tape
=boot

Boot
: hp(0,0)vmunix
87844+15464+130300 start 0x530

Process PTE in P0 or P1 space, PC: 80007E43 (XORW3 
@-7035(AP), at D0FD2A4A, at -70B0(R1))

I also get that error when attempting to boot using my dboot.init file.

Any ideas on how to resolve this?

My real goal is to simply extract the files from the tape file. If you 
can help me extract the files instead of booting it that would be great 
too.