> Neo geo games launched through the GUI do not work, giving error: the selected game > is missing one or more required rom or chd images. I have the compatible rom set and > bios, It must be an error of the GUI. if they were launched via the command line they > work fine.
No error explicitly on the Internal UI MAME side as it is simply not finding 100% of what it expects to be there. The command-line has adjustments to allow usage of same-named romset parts so long as the filenames match.
mame -verifyroms neogeo Likely says something like: "romset neogeo is bad 1 romsets found, 0 were OK."
mame -listcrc neogeo Take that output and compare it to your neogeo archive contents. Large chance you'll see that you are missing or have a mismatched crc hash concerning the recent additions(s). Source the missing/non-matching parts and you should all should be well again.
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