Quality - 463 Mk3 Ultimate.u64 Not Found High

You are likely using a ROM set designed for an older version of MAME. This specific file was added to the MAME version 0.181 Missing Parent/Child Files: UMK3 is a "child" ROM of Mortal Kombat 3 (MK3) . While some MAME versions require both

set) if the version you are playing is a "clone" or update, as MAME often looks for shared files in the parent folder. Manual Placement 463 mk3 ultimate.u64 not found