| Problem | Solution | |---------|----------| | Missing naomi.zip | Locate correct BIOS pack for your emulator version | | CHD not recognized | Ensure CHD is inside subfolder named after the ROM zip (e.g., radirgy/radirgy.chd ) | | Game freezes at “Checking GD-ROM” | Net DIMM emulation needs naomigd.zip BIOS | | Incomplete set (redump errors) | Use .dat from latest MAME to identify missing tracks |