Hi, I just started playing Warlock with version 4j, having a similar issue. Crashing is not constant, but intermittent. I had a site that repeatedly crashed a few seconds after embark, so I genned another world. I managed to play for a few in game years without crashing, and then it started again.
Playing with all workshops and furnaces enabled apart from illumination; Dwarves, Elves, Warlocks, Humans, Drow, Goblins, Gremlins, Trog. and Antmen are all on, but only warlocks are playable in fortress mode. No fortress defense races are on. Bogeymen set to zero, all other worldgen parameters unchanged.
All additional mods under misc. featres (food variety, plant variety etc )are OFF as are 'secretFUN!' and Diseases.
Mod is awesome, but unplayable for me at the moment; I can't stand to lose hours of progress.
errorlog below
*** Error(s) found in the file "data/save/region1/raw/objects/entity_default.txt"
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
*** Error(s) finalizing the interaction WEREBEAST_AOE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
path fail: wereskunk,50,51,121 -> 54,55,121: Id #17859:Path Goal Attack Building:Station Maraude Target at 51,53,121
path fail: pain elemental,54,51,121 -> 50,51,121: Id #18913:Path Goal Chase Opponent:Station Milling Flood at 55,50,121
*** Error(s) found in the file "data/save/region1/raw/objects/entity_default.txt"
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
MOUNTAIN:Unrecognized Entity Token: REACTION
*** Error(s) finalizing the interaction WEREBEAST_AOE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE
Unrecognized Caste Token in Body Transformation Effect: WEREWOLF_N:MALE