IT SEEMS to be solved
When i read your post I started search this *.dat files and found
https://www.sas1946.com/main/index.php/topic,27329.12.htmlI can generate british campaign !!!! Hurreeyyy!!
I post my dgenerror log - look, it was the same solution.
BTW , this campaign is great. Mayby You could add some Africa? - Story of pilot who fought in France, in BoB, later in North Africa, Malta, Italy, Normandy....

)
So thank you for help, for your work, for my fun.
Thanx for fast reply !
Still nothing -
so look at log
= DGen 4.0.8.6 (17/04/08) =
seed: 4965636
DGen initialization. Side: gb, Rank: 0
MaxBomberSkill=0
Distance=75 km
Length=VeryLong
AI=Normal
Missions=Normal
AirIntensity=Medium
GroundIntensity=Medium
SlowFire=5.0
PromotionRate=1.000000
Career ID: Gb7
Normandy:FB_channel40
Inherits FB_channel40
ReadDB sorties:1
PlayerWing found:RAF_No001SQN
TestWing(f,s): I_JG26 0 00
TestWing(f,s): I_JG2 0 00
TestWing(f,s): II_JG2 0 00
TestWing(f,s): III_JG2 0 00
TestWing(f,s): I_JG26 0 00
TestWing(f,s): I_JG2 0 00
TestWing(f,s): II_JG2 0 00
TestWing(f,s): III_JG2 0 00
TestWing(f,s): RAF_No001SQN 0 00
TestWing(f,s): RAF_No003SQN 0 00
TestWing(f,s): RAF_No081SQN 0 00
TestWing(f,s): RAF_No087SQN 0 00
TestWing(f,s): RAF_No091SQN 0 00
TestWing(f,s): RAF_No001SQN 0 00
TestWing(f,s): RAF_No003SQN 0 00
TestWing(f,s): RAF_No081SQN 0 00
TestWing(f,s): RAF_No087SQN 0 00
TestWing(f,s): RAF_No091SQN 0 00
TestWing(f,s): RAF_No001SQN 0 00
TestWing(f,s): RAF_No003SQN 0 00
TestWing(f,s): RAF_No001SQN 0 00
TestWing(f,s): RAF_No003SQN 0 00
TestWing(f,s): RAF_No001SQN 0 00
TestWing(f,s): RAF_No003SQN 0 00
TestWing(f,s): RAF_No081SQN 0 00
TestWing(f,s): RAF_No087SQN 0 00
TestWing(f,s): RAF_No091SQN 0 00
Blue skill set: 5 20 30
Red skill set: 15 50 30
Inherits operations from DGen\opsB_Channel42.dat
MissionDistance set, testing DGen\FB_channel40Red0.mis
Can't open!
MissionDistance set, testing DGen\FB_channel40Blue0.mis
Can't open!
Dangerous areas
Red:1 Blue:15
Can't open Message file DGen\GB_MessageRu.dat
I chcecked - thid files, which IL2 can`t open - they don`t exist even in folder made after unzipping westfront_1.2_hsfx6.zip