When playing the campagin following "liberation", a error window appear (titled "FMManager Error") with the message "There are too much handlers: 1237240".
Workaround : cheat code (press Enter) "walkover".
Note: It occurs also with the latest latest patch and even with 8 GB RAM.
The full content of the error windows that appear when launching the game:
« Engine.exe detected, that video memory is not configured properly. Please restart computer and set AGP Aperture size = 256 MB or more in BIOS configuration program. Usually you can enter BIOS configuration utility by pressing `DEL' while computer restart. »
There was a patch. Note: as of 2018 it seems not downloadable anymore from this website, but it is downloadable from another.
From a file manager, open the folder: "Program Files/GSC Game World/Cossacks II/Data/Sound/interface"
Rename the file interf_click1.wav to select1.waw (less noisy). You must provide a sound file for "select1.wav" otherwise the game will not start.
From a file manager, open the folder: "Program Files/GSC Game World/Cossacks II/Data/"
Rename the following file names (you may add "_off" for example):