It looks like you are dealing with a missing BIOS or ROM file for (Multiple Arcade Machine Emulator), specifically for hardware using the Sony ZN-1/ZN-2 or Taito G-NET systems.
The error message indicates a missing BIOS file required by emulators like MAME (Multiple Arcade Machine Emulator) to run specific arcade hardware. Technical Summary 78081g503.ic655 not found
If all else fails, this error likely requires vendor intervention. Provide them with: It looks like you are dealing with a
dbGetObjByName("78081g503" "ic655")