the orignal card stacks have a bug in the last card, 
there's a 4 char halt command w/o WM, e.g. .101 or .501
This would only work on very old VDC versions, which itself had a bug,
and both bugs cancelled each other out.

thx to discord user mstram for pointing this out,
and to user DieMade for the suggested fix.

*** FIX: ***
in the cardload file, MODIFY the last line by adding ",064071", e.g. like:

"STOP AND JUMP TO PROG START                                .101"
or
"STOP                                                       .501"

to e.g.:
"STOP AND JUMP TO PROG START                                ,064071.101"
or
"STOP                                                       ,064071.501"

*** SAME WITH THE PROGRAM SHEET ("tiny assembler") ***
on sheet 'INTERN combine cards', cell A1,
change e.g.
="STOP AND JUMP TO PROG START                                ." & 'INTERN prog calc sheet'.E5
to e.g.
="STOP AND JUMP TO PROG START                                ,064071." & 'INTERN prog calc sheet'.E5