Error 400 - not a dirty disk!

Hello all!

I tried a lot, so i have to ask here…

using win98

All versions since the vs2008 rebuilt will give me that error code;
Task 1 failed error 400 (151… Video_ts.ifo)

I tried some versions up to 5.076 (newer ones are not working under win98) and
several disks. DVDFab will copy all the vob files but wont copy/create any of the ifo or bup files.

did also try all setup options for path player, but didnt any good.
did several clean reinstalls.
i searched the forum but no one else seems to have this problem for all disks, so any ideas?