Fg-optional-mp-files.bin [ Limited » ]

Never delete or modify cache files while FlightGear is running.

Use your operating system’s file search. If you cannot find it, launch FlightGear once, join a multiplayer session (e.g., the MPServer01), then exit. The file will be created. fg-optional-mp-files.bin

If you have more details or a specific context in mind regarding "fg-optional-mp-files.bin", I'd be happy to try and provide a more targeted response. Never delete or modify cache files while FlightGear

While the file serves a useful purpose, several problems frequently arise: Then, run a manual scenery check using FlightGear’s

Delete all cache files in the same directory:

Then, run a manual scenery check using FlightGear’s launcher → Settings → “Download scenery on demand”.

If you suspect fg-optional-mp-files.bin is causing trouble, follow this workflow: