Hi,
all aircraft need a registration code now to pass route validation - at least within european airspace.
(FPL-LOT001-IN -B738/M-DGFIRSWY/L -EDDF0850 -N0430F260 MARUN Y150 TOLGI Z90 DLE UP605 NOLGO -EDDH0057 -PBN/A1B2C1D1L1O1S2 NAV/GPS DOF/180301) (R)PROF204: RS: TRAFFIC VIA IFPZ IS ON FORBIDDEN ROUTE REF:[EUIFPS002A] AIRCRAFT REG IS REQUIRED
For LOT001 used in vroute e.g. REG/SPVRT
Best Regards
David