Hello, sorry to bug you with this but I can't figure it out. My log is over 66MB after 8 hrs. (...I was playing for 8hrs?) and most of that log is taken up by the following:

[22:38:28] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: java.lang.NullPointerException
[22:38:28] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at CoroUtil.pathfinding.PFQueue.getBlock(PFQueue.java:1677)
[22:38:28] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at CoroUtil.pathfinding.PFQueue.createPathTo(PFQueue.java:900)
[22:38:28] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at CoroUtil.pathfinding.PFQueue.manageQueue(PFQueue.java:292)
[22:38:28] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at CoroUtil.pathfinding.PFQueue.run(PFQueue.java:160)
[22:38:28] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]: at java.lang.Thread.run(Unknown Source)
[22:38:31] [Pathfinder Thread/INFO] [STDERR/]: [java.lang.Throwable$WrappedPrintStream:println:-1]:

This is with coroutil-1.1.3 for MC v1.7.10. From reading the changelog, I can see 1.3 addressed a similar issue with pathfinding. I'm therefore wondering if I've done something odd with my mods. I'm also running Weather2 (using the new CoroUtil 1.1.3, not the 1.1.1 version packaged with the Weather2 mod).

Coroutil's config gives me no hints either.
coroutil {
S:chunkCacheDimensionBlacklist_IDs=
S:chunkCacheDimensionBlacklist_Names=promised
B:chunkCacheOverworldOnly=true
B:trackPlayerData=false
B:usePlayerRadiusChunkLoadingForFallback=true
}

I've tried resetting the Zombie Awareness config, then "stealing" configs from mod packs that include Zombie Awareness. I'm definitely motivated to get this working as it is kind of awesome. Essential, even.

I'm also using a lot of other mods, including Alternate Terrain Generation and mods that add a lot of new blocks, like Underground Biomes Constructs. I'm unsure if one of my mods is affecting this, or even how to go about finding which one. The zombies still appear, to me at least, to be pathfinding just fine. It's really only the log that's alarming me.

I'd be grateful for any suggestions.
Thanks

Edit: I'm going to close this as I seem to have figured it out.
I changed B:chunkCacheOverworldOnly=false (it was true by default).

I can't be 100% certain if that's what made the difference but I'm no longer getting any console spam.