Same here, captured this error when I fired the machine gun from the driver position in the Tiger.
Application popup: Aces High II (beta): aceshigh.exe - Application Error : The instruction at "0x004ced93" referenced memory at "0x0000001c". The memory could not be "read".
Click on OK to terminate the program
Click on CANCEL to debug the program
Looks cryptic to me
Further...all in the Tiger...
When I started a A149 to spawn into A3 from the SE launch, my GV was literally surrounded by trees. I managed to eek out an opening (reverse).
There is a large zero "O" blinking over the gear indicator
The barrel of the main gun flickers while in the driver position
Heading back in