🚀 go-pugleaf

Hello,
I have a friend with an Atari ST (I think it's a 1040--plain vanilla) & I'm
seeking some info for her.  (She's had it wuite awhile, but is still very much
a novice.)  One problem is a "TOS error #35" message whenever she tries to 
access one particular file.  She says the manual has no info about error 
numbers, and I had no luck at the bookstores around here.  I'm sure she's
using an older version of the operating system & the software she's using
(a database--I don't recall the name) has probably been upgraded as well.
Actually, that would be handy to know (the database name)...  It had icons
with names like "useone" and "makeone" and "moveone" and the database icons
were named "whatever.one".  If this means anything to anyone, what is the
current status of this mailing list/simple DB.  Anyway, what I want to know
is...   1)  What is TOS error #35 ?
        2)  Any info about this database ?
        3)  Is there a decent book with references on this info (error #s,etc)
        4)  Favorite magazines?
        5)  How can she update her OS without a local dealer?
Thanks very much for your help.....
                                  ........<<<<<< Amy Jones >>>>>>