Thanks for that, game by default have memory pool set to high, but i low down for other reasons, and i suggest others to do same. Just need to remember return it to high when play this custom map.
Reason is: memory pool is virtual memory of game. Capacity of pool is approximately big compared with RAM on PC (like pagefile, more RAM on Pc, bigger pagefile, more RAM bigger pool), and since this game is 9 yo, and modern PCs with low POOL have bigger pool then older PC (due more RAM memory), is enough for play having low POOL. High pool settings may cause issue for many players, like very long time to connecting in servers. All are in saferoom, and person with high memory pool need wait to load in server 2 mins longer.
Why is POOL in conflict with some game files, may be due to programming of custom map, and may be the character model with high polygons issue.