Just tried this yesterday, worked very well but had a few problems.
atari5200 and supergrafx had no successful scrapes. ROMs are from No-Intro set.
FBA had almost no successful scrapes, only 154 out of 4156 worked, that number should have been several hundred right? Or should it be almost all of them?
I thought maybe the directory name causes it to scrape from different sources so I tried fba, fba_libretro, and mame, same results for all. ROMs are from the set called FBA v0.2.97.38 .
Maybe there is still a problem with mamedb causing so many failures?