03-31-2019, 04:22 PM
Whenever a class is introduced, all routes must me manually updated to allow that class to be used, which can be quite the hassle by 1976 when business class is established, and sometimes comes standard on aircraft, but if you assign an aircraft with business class seats on routes that don't have business class, time won't progress, forcing you to dig through your routes looking for the offending route. This is more problematic if you are up past 100 aircraft, and counting.