['Sweeney' Todd]

Whenever the V1 is set to fly, via FMB, I get the following error (all OK via QMB):

Mission Loading failed:
Weapon set 'Default' not Registered in air.Fi_103_V1

I am using U1.2 and all has been OK with other aircraft mods.

Air.ini and Plane_RU.properties have been updated as per instructions on page 1.

Help, I'm stuck this time.