I found mod.
conflict with Thaumcraft-1.7.10-4.2.3.5
http://pastebin.com/Vj8czdpi
	 
	
	
	
	
	
	
	
		after generation of the world crash occurs. on server.
no mod, everything is OK.
	 
	
	
Yeah this is not an issue. Its most likely another mod installed causing issues. 
 Fastcraft has had no mod issues and I have this settup to prove it.
Changelog located here.
https://www.dropbox.com/sh/zz05i9vq7qd…TV2MEv0wFa?dl=0
------------------------------------------------------------------------------------------
Client Current Modlist
[1.7.10]bspkrsCore-universal-6.15.jar 
[Client]-ClockHUD-1.7.10-1.1.jar 
[Client]-CustomMainMenu-MC1.7.10-1.8.jar 
[Client]-DamageIndicatorsMod-3.2.0.jar 
[Client]-forgeessentials-1.7.10-1.4.3.1008-client.jar
[Client]-journeymap-1.7.10-5.1.0-unlimited.jar 
[Client]-ResourceLoader-1.2.jar 
[Client]-WAILA-features-1.7.10-0.0.5.jar 
[Universal]-AoA-2.4.B.jar 
[Universal]-AtelierCanvas-0.2.0.jar 
[Universal]-backpack-2.0.0-1.7.x.jar 
[Universal]-BetterFps-1.0.1.jar 
[Universal]-BetterRecords-1.7.10-1.2.0.jar 
[Universal]-BiblioCraft[v1.11.2][MC1.7.10].jar 
[Universal]-BiblioWoods[Forestry][v1.7].jar 
[Universal]-Botania r1.7-225.jar 
[Universal]-BuildHelper_v1.0.0.jar 
[Universal]-Carpenter's Blocks v3.3.7 - MC 1.7.10.jar
[Universal]-Chisel-2.9.2.8.jar 
[Universal]-CodeChickenCore-1.7.10-1.0.7.47.jar
[Universal]-CoFHCore-[1.7.10]3.0.3-303.jar 
[Universal]-dungeonpack-1.7.10-1.0.jar 
[Universal]-EnderCore-1.7.10-0.1.0.25_beta.jar 
[Universal]-fastcraft-1.22-ctest15.jar 
[Universal]-FastLeafDecay-1.7.10-1.3.jar 
[Universal]-FloatingRuins-universal-1.7.10.r02.jar
[Universal]-forestry_1.7.10-4.0.8.36.jar 
[Universal]-FPSPlus-1.7.10.jar 
[Universal]-GardenStuff-1.7.10-1.6.8.jar 
[Universal]-Headcrumbs-1.6.2.jar 
[Universal]-HQM-The Journey (4.3.0).jar 
[Universal]-IguanaTinkerTweaks-1.7.10-2.1.5.jar
[Universal]-InventoryTweaks-1.59-dev-152.jar 
[Universal]-Jabba-1.2.1a_1.7.10.jar 
[Universal]-JustAnotherSpawner-0.17.6.jar 
[Universal]-LycanitesMobsComplete 1.13.0.3 [1.7.10].jar
[Universal]-Mantle-1.7.10-0.3.2a.jar 
[Universal]-MultiMine-1.7.10.jar 
[Universal]-natura-1.7.10-2.2.1a2.jar 
[Universal]-neiaddons-1.12.13.38-mc1.7.10.jar 
[Universal]-NEIIntegration-MC1.7.10-1.0.13.jar 
[Universal]-NotEnoughItems-1.7.10-1.0.5.118.jar
[Universal]-Pam's HarvestCraft 1.7.10k.jar 
[Universal]-Railcraft_1.7.10-9.7.0.0.jar 
[Universal]-roguelike-1.7.10-1.3.6.3.jar 
[Universal]-Ruins-1.7.10.jar 
[Universal]-SimpleBlocks.1.0.0.jar 
[Universal]-TConstruct-1.7.10-1.8.7.jar 
[Universal]-Thaumcraft-1.7.10-4.2.3.5.jar 
[Universal]-TinyStorage-1.20.4_185.jar 
[Universal]-Treecapitator-universal-2.0.4.jar 
[Universal]-Waila-1.5.10_1.7.10.jar 
[Universal]-waila-blacklist-1.7.10-0.1.jar 
[Universal]-WailaEvents-1.0.0.jar 
[Universal]-WailaHarvestability-mc1.7.x-1.1.2.jar
[Universal]-WAILAPlugins-MC1.7.10-0.1.2-21.jar 
[Universal]-Wawla-1.3.1-1.7.10.jar 
Baubles-1.7.10-1.0.1.10.jar 
CarpentersBlocksCachedResources.zip 
CodeChickenLib-1.7.10-1.1.3.138-universal.jar
---------------------------------------------------------------
Server Current Modlist
[1.7.10]bspkrsCore-universal-6.15.jar 
[Server]-forgeessentials-1.7.10-1.4.3.1008-server.jar
[Server]-JourneyMapServer1.0.5_MC1.7.10.jar 
[Universal]-AoA-2.4.B.jar 
[Universal]-AtelierCanvas-0.2.0.jar 
[Universal]-backpack-2.0.0-1.7.x.jar 
[Universal]-BetterFps-1.0.1.jar 
[Universal]-BetterRecords-1.7.10-1.2.0.jar 
[Universal]-BiblioCraft[v1.11.2][MC1.7.10].jar 
[Universal]-BiblioWoods[Forestry][v1.7].jar 
[Universal]-Botania r1.7-225.jar 
[Universal]-BuildHelper_v1.0.0.jar 
[Universal]-Carpenter's Blocks v3.3.7 - MC 1.7.10.jar
[Universal]-Chisel-2.9.2.8.jar 
[Universal]-CodeChickenCore-1.7.10-1.0.7.47.jar
[Universal]-CoFHCore-[1.7.10]3.0.3-303.jar 
[Universal]-dungeonpack-1.7.10-1.0.jar 
[Universal]-EnderCore-1.7.10-0.1.0.25_beta.jar 
[Universal]-fastcraft-1.22-ctest15.jar 
[Universal]-FastLeafDecay-1.7.10-1.3.jar 
[Universal]-FloatingRuins-universal-1.7.10.r02.jar
[Universal]-forestry_1.7.10-4.0.8.36.jar 
[Universal]-FPSPlus-1.7.10.jar 
[Universal]-GardenStuff-1.7.10-1.6.8.jar 
[Universal]-Headcrumbs-1.6.2.jar 
[Universal]-HQM-The Journey (4.3.0).jar 
[Universal]-IguanaTinkerTweaks-1.7.10-2.1.5.jar
[Universal]-InventoryTweaks-1.59-dev-152.jar 
[Universal]-Jabba-1.2.1a_1.7.10.jar 
[Universal]-JustAnotherSpawner-0.17.6.jar 
[Universal]-LycanitesMobsComplete 1.13.0.3 [1.7.10].jar
[Universal]-Mantle-1.7.10-0.3.2a.jar 
[Universal]-mobcapper-7.0.jar 
[Universal]-MultiMine-1.7.10.jar 
[Universal]-natura-1.7.10-2.2.1a2.jar 
[Universal]-neiaddons-1.12.13.38-mc1.7.10.jar 
[Universal]-NEIIntegration-MC1.7.10-1.0.13.jar 
[Universal]-NotEnoughItems-1.7.10-1.0.5.118.jar
[Universal]-Pam's HarvestCraft 1.7.10k.jar 
[Universal]-Railcraft_1.7.10-9.7.0.0.jar 
[Universal]-roguelike-1.7.10-1.3.6.3.jar 
[Universal]-Ruins-1.7.10.jar 
[Universal]-SimpleBlocks.1.0.0.jar 
[Universal]-TConstruct-1.7.10-1.8.7.jar 
[Universal]-Thaumcraft-1.7.10-4.2.3.5.jar 
[Universal]-TinyStorage-1.20.4_185.jar 
[Universal]-Treecapitator-universal-2.0.4.jar 
[Universal]-Waila-1.5.10_1.7.10.jar 
[Universal]-waila-blacklist-1.7.10-0.1.jar 
[Universal]-WailaEvents-1.0.0.jar 
[Universal]-WailaHarvestability-mc1.7.x-1.1.2.jar
[Universal]-WAILAPlugins-MC1.7.10-0.1.2-21.jar 
[Universal]-Wawla-1.3.1-1.7.10.jar 
Baubles-1.7.10-1.0.1.10.jar 
CarpentersBlocksCachedResources.zip 
CodeChickenLib-1.7.10-1.1.3.138-universal.jar 
ruins_log.txt 
worldedit-forge-mc1.7.10-6.1.1-SNAPSHOT-dist.jar
All these mods combined I have had zero issues. I have also seen as much as 400% frame increase with this modpack.