FMS does not accept a waypoint in my flightplan

[Roberto Alfieri 0]

Hallo

 

I'm entering a flight plan, calculated by PRO-ATC-X. The plan is as follow:

 

LSZH DCT ALBIX DCT ABESI N851 TORTU DCT BEBEV UM733 CORSI DCT LABOM DCT KOVAS LIEE

 

All works fine, but when I try to enter the leg N851 to TORTU it is impossible to input. If I put as "via" the N851 airway it does not accept the TORTU wp. If I input TORTU as a direct destination, no problem.

 

Prepar3D 3.4 fix 2 with Navigraph data updated to 1613 rev 1 (currently last one)

 

Libraries rebuilt borh in PRO-ATC and Carenado.

 

Can someone help? Thank you.