Thanks to all who responded so far to my problem.
Finally I was able to download 3.1.0.5L. But unfortunately
this level still doesn't solve my problem.

I still get the following messages if I try to backup a file with
unprintable
characters in the filename:

ANS1228E Sending of object
'\\viw_sv101_010\e$\Illwerke\PE\ADM\KVM\SHaus\Kassen\saison98so\+9++̦H0
.00N' failed
ANS4005E Error processing
'\\viw_sv101_010\e$\Illwerke\PE\ADM\KVM\SHaus\Kassen\saison98so\+9++̦H0
.00N': file not found 

As you can see the filename consists of hex characters from '00'X to
'FF'x.
USEUNICODEFILENAMES OFF has been set in DSM.OPT. This has been
tested with Windows NT 4.0 SP 3, english version. In DSM.OPT the
language
defaults to english as well.

Any ideas how I can save such files?

Thanks in advance

Thomas Rupp
Vorarlberger Illwerke AG
MAIL:   thomas.rupp AT illwerke.co DOT at
TEL:    ++43/5574/4991-251
FAX:    ++43/5574/4991-820-8251