Strange ADVENT error messages (OS/8)

[djg at pdp8.net]

>This disk image works perfectly (including ADVENT) on my laptop
>running SIMH.
>
The way advent is saved it is dependant on exact conditions when it
is saved.  If hardware is changed or files are moved it will not work.

If you follow the instructions in advent.dc you can resave it.  
For reference
http://www.pdp8.net/pdp8cgi/os8_html/ADVENT.DC?act=file;fn=images/os8/diag-games-kermit.rk05;blk=2243,9,1;to=auto

An updated version is at http://www.rickmurphy.net/adventure.html