In the Asia series you're probly flying from non-default bases.  For advanced info to work you have to make entries into the airbases.dat file for any non-default bases you or any AI planes are flying from.

1.
There are several possible causes for this error.
I doubt that the problem is up to airbase.dat file.
I had a similar problem with the swordfish-campaign.
Some of these problems were because no british advanced_info_screen was defined
in the "uires" folder and no entry in the Country.cfg for that.
But nevertheless at two missions (the Rotterdam and the Dunkirk-Mission) the error occurs.


2.
I have made the entries in the airbase.dat-file for Japan-Islands,Malaysia,Phillipines and Taiwan.
The Problem that the Programm breaks down when you use the M-Key or "Advantged-Info" in the Briefing
still exists.
Furthermore the "Mission Builder " just reads in the bases until runway Nr 236 (In my case Bagabag).
This base is in the "Mission Builder" at the wrong place.

The entry in the airbase.dat file:

[runway.234]
id=18340
name=Philippines-Bacolod
heading=0
allegiance=0
units_across=2
base_lat=N10* 38.71'
base_lon=E122* 55.74'
base_alt=0
takeoff_start_pos=100,0
takeoff_stop_pos=1600,200
landing_start_pos=5000,350
landing_touchdown_pos=600,0
landing_stop_pos=-250,0

The same  position is in the "Trainings Flight"-Menu, so I can start in the game from the right position.
But in the "Mission-Builder" the base is at position:

base_lat=N10* 38.71'
base_lon=E120* 55.74'

The real Problem is that the MB doesn't read any further entry.
Has someone an idea ?
Are there any limitation's for the number of airbases ?

Thank you for your answers.

If thetre is a limit, I dont know what it is, cause i have 250 entries in one of my airbase flies and it works fine.