ntdll.ll Access Violation Error in Multiplayer Thread - Ultimate Apocalypse Mod (DOW SS) for Dawn of War

My father and I have been trying for the last hour or so to get our games working again, with no success. We've been crashing more and more often, usually between ten and thirty minutes into the game. Playing Abbadon's Crutch (eight player map, just us and AI), Chaos Space Marines and Space Marines, the rest are random. We have the non-Steam versions of Soulstorm, and use Hamachi for LAN tunneling. Game rules we use are Apocalypse Rules, Addon: Nuclear War, Addon: Aid - Builders, Addon: AI Donations, Auto Abilities, Win/Lose Extermination, Game Timer. When we crash my father gets a Sync Error (I'm always host) and when exiting we both crash to desktop. So far we've tried:

Setting every .exe to be run as administrator.
Setting Soulstorm to use the compatbility mode for Windows XP Serivce Pack 3 (I run Windows 8.1, dad runs Windows 10).
Editing Soulstorm with CFF Explorer to allocate more RAM.
Setting us as the owner of "ntdll.ll" and giving full permissions to everything (I was unfamiliar with a ntdll.ll error).

I've double and triple checked, we're both running Soulstorm version 1.2.120 with NTCore .exes, running the same mod version: 1.85.52 build 120 (UAB is an older version because I read that the newer versions limit the amount of turrets you can build, and we love us some turret walls). We have all the races and everything unlocked. As far as I'm aware we do not have any different attribute files (I changed the main menu music of Sisters of Battle for him but that shouldn't be the problem). I should mention, this has started just tonight - we've always crashed every once in a while, but now we can't go a game without a crash and it's very annoying. I'm wondering if perhaps there's a corrupted mod file somewhere? Because my father also crashes instantly if there's an AI controlled Necron player in the game, and I also noticed that when I tried to access the Tyranid AI Control Panel (on both computers) it said that the file could not be found. I don't remember why, but I think I read that the Tyranid and Necron AIs are mixed or call on each other for some reason? Game does not crash if there are AI controlled Tyranids.

Here are some crash logs:
"warnings.txt" - Pastebin.com
Error Log (from the last game) - Pastebin.com
There are also two error logs in "LogFiles" but after looking through them I'm fairly certain they're useless here. If you'd like me to post them let me know.

Sorry about the length, I was very specific because I really do hate when people ask for my help and then give me almost nothing important to go on. If you need more information that any of that (I don't have any idea what else you'd need, though) I'll be happy to reply. Also, and very off topic but on the small chance that Lord Cylarne himself reads this, do you need a female voice actor for the mod? I noticed that it seems to be lacking a bit in that department; I have a decent microphone and wouldn't mind putting in some time for that.