False. Older ROM dumps often had errors (bad dumps, wrong endianness, headers). FBNeo requires current, verified dumps.
The "Unknown" error is almost always a version mismatch. fbneo romset unknown
: Trying to run 3D arcade games or games that aren't in the FBNeo compatibility list will trigger this error. How to Fix the Issue Guide :: Retroarch issues and fixes - Steam Community headers). FBNeo requires current