
Press and hold the "Shift" key, then right-click on the MAME folder.
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When I open a rom in Launchbox, it will say initializing and then quit after a few seconds. Launchbox is showing the path to the roms as correct. Also have mame.ini in the root of my mame emulator folder. I have the full path to the roms set in mame.ini.

Furthermore, this reproduction into a single file is known as a ROM.
