hi my worlds keep getting to the stage after about 20 mins of playing where my client will start to freeze every 5-10 seconds and my log is full with [atomicstryker.battletowers.common.WorldGenHandler:flushCurrentPosListToFile:427]
java.io.FileNotFoundException: C:\Users\matty5ps\Documents\Curse\Minecraft\Instances\mattpack444\saves\holking\BattletowerPositionsFile.txt (The system cannot find the path specified) etc etc

upon further inspection it would seem that the spam starts when ive died in a hardcore world ( i only play in hardcore so not sure about normal) and i delete the world and make a new one it starts crying about the file not existing.

Can you try creating the file by hand? Is there anything that would block the java process from creating the file?