If you are seeing this error on a standard Windows PC, it likely means you are running legacy emulation software or a vendor-specific diagnostic tool.
: Ensure your ROM version matches your MAME executable version (e.g., v0.287). MAME updates frequently change file requirements. 78081g503.ic655 not found
(MAME 0.275+), the emulator may report this file as "NOT FOUND" but still run the game if it's marked as a "no good dump known" or if the file is not critical for basic emulation. LaunchBox Community Forums How to Fix It Identify the Parent BIOS If you are seeing this error on a
It must contain 78081g503.ic655 along with m534002c-61.ic353 and mg01.ic652 . 2. Match Your ROM Set Version 78081g503.ic655 not found