It is the strangest thing! But I swear that no new units appeared by the time I quit the game at 2200 hours game time.Hi Jean
It is very strange as one from the four Prussian variants is always selected by the game engine at 11.30 am although the actual arrivals start between 4 and 5 pm. For Grouchy's forces typically there are 2 or 3 variants whereby each Corps will appear and one or two whereby they will not. Again each variant is selected at 11.30 am for implementation in the early evening.
The Prussian units all have commands that will send them to attack towards either Plancenoit, Papelotte or Wellington's left flank. Thus they should be noticeable. If there was a mix up with the OOB file for the Prussians or some such in your mods you would get some sort of error message or the game might crash.
In any event if you now have a situation where the Prussians have appeared you can see how you get on. Did you note what time they actually did appear?
I would still be interested in seeing the game database to see what impact the artillery mod is having on your casualties.
On the second play-through that began at 1437, the new units arrived at around 1700. First, Exelmann's Corps near Maransatt and the Prussians appeared a few minutes later.
BUT BE ASSURED that I am right about how the two separate play-throughs had different results. On the original play-through, the random events may have fired at 1130, but, some later glitch prevented their appearance.
I did not recon the entire battlefield map so there is a possibility that the new units did appear at the map edge and just stayed there for the duration without moving. However, I did send some light cav over to Mansaratt to occupy that Waypoint Objective and saw no new units at that map area.