> That when I run my scan, I am not asked 100 times about checking duplicate
> roms... Just an idea
>


You mean while receiving the data from a MAME execuatble?
Simply set Settings->'datfile errors' to "Show common" or "hide common". It's not recommended to use "show all" for MAME because MAME's -listinfo output produces a lot double-roms due to their driver export function.

Roman Scherzer
ClrMamePro