I have a similar problem trying to set up MaLa 174, with MAME version 0.147, running XP.
Mala launches, get message of collecting Bios, that is OK, then "Collecting games", then
"Error opening mame XML file!"
"0 games collected in the list
No games added
Review collection options (which I did) and ensure using XML file is >.84"
I found "mame.xml in the MAME folder, but cannot determine if it is >.84
The ROMS are version 1.47, and I have (5) of them in the ROMs folder, still zipped.
Help with this would be appreciated, I am ready to move on to setting up a controls console and cabinet.
Thanks