Had another question but felt like bumping this thread would be better than making a new one.
So, I've made a few worlds using this world_gen code:
[WORLD_GEN]
[TITLE:Volcanoes, evil and savage.]
[DIM:257:257]
[END_YEAR:1000]
[BEAST_END_YEAR:500:50]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:1]
[ELEVATION:100:400:1200:1600]
[RAINFALL:0:100:600:1200]
[TEMPERATURE:25:80:500:500]
[DRAINAGE:25:100:1000:1000]
[VOLCANISM:49:100:1600:1600]
[SAVAGERY:50:100:1600:1600]
[ELEVATION_FREQUENCY:1:1:1:1:1:1]
[RAIN_FREQUENCY:1:1:1:1:1:1]
[DRAINAGE_FREQUENCY:1:1:1:1:1:1]
[TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
[SAVAGERY_FREQUENCY:1:1:1:1:1:1]
[VOLCANISM_FREQUENCY:1:1:1:1:1:1]
[GOOD_SQ_COUNTS:200:400:1200]
[EVIL_SQ_COUNTS:2000:4000:12000]
[PEAK_NUMBER_MIN:0]
[OCEAN_EDGE_MIN:0]
[VOLCANO_MIN:25]
[REGION_COUNTS:SWAMP:0:0:0]
[REGION_COUNTS:DESERT:0:0:0]
[REGION_COUNTS:FOREST:0:0:0]
[REGION_COUNTS:MOUNTAINS:0:0:0]
[REGION_COUNTS:OCEAN:0:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:0:0:0]
[REGION_COUNTS:HILLS:0:0:0]
[EROSION_CYCLE_COUNT:2]
[RIVER_MINS:800:800]
[PERIODICALLY_ERODE_EXTREMES:0]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:5000]
[CAVE_MIN_SIZE:1]
[CAVE_MAX_SIZE:200]
[MOUNTAIN_CAVE_MIN:100]
[NON_MOUNTAIN_CAVE_MIN:200]
[ALL_CAVES_VISIBLE:1]
[SHOW_EMBARK_RIVER:2]
[SHOW_EMBARK_POOL:2]
[SHOW_EMBARK_M_POOL:2]
[SHOW_EMBARK_M_PIPE:2]
[SHOW_EMBARK_CHASM:2]
[SHOW_EMBARK_PIT:2]
[SHOW_EMBARK_OTHER:2]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:100]
[TOTAL_CIV_POPULATION:20000]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:0:0:0]
[RAIN_RANGES:0:0:0]
[DRAINAGE_RANGES:0:0:0]
[SAVAGERY_RANGES:0:0:0]
[VOLCANISM_RANGES:0:0:0]
It works pretty good for everything I want and I've found quite a few ideal spots. My problem is that for some reason dwarven caravans or migrants NEVER come to where I settle. It says that the dwarves exist under civilizations, they have a king, etc. but they never show up. Not even a "bypassed your site" message. I've made sure that my Depot has access, made wealth (Over 200k of it) and all I get is trading with humans, elves and halflings. Although I do embark on Savage/Evil tiles, I was expecting to get SOME sort of immigrants but none show up. Not even after 7 ingame years.
What could be the problem?