MAME version 0.139u1 is widely considered the standard for mobile and low-power emulation, specifically for . Unlike modern versions, this specific "u1" (update 1) set remains static, making it easier to manage but requiring precise file matching. Core Requirements for a 0.139u1 Set
In a non-merged set, every single zip file contains absolutely every file needed to run that specific game. roms for mame 0139u1
It is likely a "missing file" error. Ensure your ROMs are exactly from a 0.139 set and not a newer version. If using a "split" set, ensure you have the Parent ROM. MAME version 0