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
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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
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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.