With the P3Dv4 release saving the OFP to the AOC service does not work here, it looks as if the PFPX OFP cannot be parsed. It appears in the folder on save and is then removed.   Additionally the service does not look to be configured for P3Dv4 files, this can be resolved by the instruction posted on the FSL forum here   A workaround I'm using however is to export  .pln to the AOC service folder \FSLabs\AOCService\Uplink\127.0.0.1-4555-NAV1711001   EDIT: you can als