Check which version of MAME or FinalBurn Neo you are using. ROMs are version-specific; a ROM set for MAME 0.139 may not work on MAME 0.265 .
(Multiple Arcade Machine Emulator) platform when users attempt to launch the game. What is ps63b.1a? In the context of arcade emulation, Ps63b.1a Download
Here is a short story based on that search for the elusive file: The Ghost in the Machine Check which version of MAME or FinalBurn Neo you are using
In many cases, the emulator will show a "Missing Files" warning but will still allow the game to boot and play if you press a key to bypass the notification. Ps63b.1a Download