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Hi, I downloaded several mods and im trying to playing with them, but every now and then it crashes. I have little experience with fixing this kinds of stuff so if its something obvious sorry! I really don't understand most of this so an instruction on how to fix it will probably be needed xD. Here is the crash report.

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 9/13/15 9:39 PM
Description: Ticking memory connection

java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at uristqwerty.CraftGuide.itemtype.ItemType.findMatchingNBT(ItemType.java:199)
at uristqwerty.CraftGuide.itemtype.ItemType.getInstance(ItemType.java:186)
at uristqwerty.CraftGuide.itemtype.ItemType.getInstance(ItemType.java:133)
at uristqwerty.CraftGuide.RecipeCache.generateAllItemList(RecipeCache.java:114)
at uristqwerty.CraftGuide.RecipeCache.reset(RecipeCache.java:75)
at uristqwerty.CraftGuide.RecipeCache.<init>(RecipeCache.java:42)
at uristqwerty.CraftGuide.GuiCraftGuide.<init>(GuiCraftGuide.java:41)
at uristqwerty.CraftGuide.GuiCraftGuide.getInstance(GuiCraftGuide.java:64)
at uristqwerty.CraftGuide.client.fml.CraftGuideClient_FML.openGUI(CraftGuideClient_FML.java:109)
at uristqwerty.CraftGuide.ItemCraftGuide.func_77659_a(ItemCraftGuide.java:43)
at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:146)
at net.minecraft.server.management.ItemInWorldManager.func_73085_a(ItemInWorldManager.java:316)
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:539)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at uristqwerty.CraftGuide.itemtype.ItemType.findMatchingNBT(ItemType.java:199)
at uristqwerty.CraftGuide.itemtype.ItemType.getInstance(ItemType.java:186)
at uristqwerty.CraftGuide.itemtype.ItemType.getInstance(ItemType.java:133)
at uristqwerty.CraftGuide.RecipeCache.generateAllItemList(RecipeCache.java:114)
at uristqwerty.CraftGuide.RecipeCache.reset(RecipeCache.java:75)
at uristqwerty.CraftGuide.RecipeCache.<init>(RecipeCache.java:42)
at uristqwerty.CraftGuide.GuiCraftGuide.<init>(GuiCraftGuide.java:41)
at uristqwerty.CraftGuide.GuiCraftGuide.getInstance(GuiCraftGuide.java:64)
at uristqwerty.CraftGuide.client.fml.CraftGuideClient_FML.openGUI(CraftGuideClient_FML.java:109)
at uristqwerty.CraftGuide.ItemCraftGuide.func_77659_a(ItemCraftGuide.java:43)
at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:146)
at net.minecraft.server.management.ItemInWorldManager.func_73085_a(ItemInWorldManager.java:316)
at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:539)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)

-- Ticking connection --
Details:
Connection: [email protected]
Stacktrace:
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 246571504 bytes (235 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1492 64 mods loaded, 64 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAAAA FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1492-1.7.10.jar)
UCHIJAAAAAA Forge{10.13.4.1492} [Minecraft Forge] (forge-1.7.10-10.13.4.1492-1.7.10.jar)
UCHIJAAAAAA appliedenergistics2-core{rv2-stable-10} [AppliedEnergistics2 Core] (minecraft.jar)
UCHIJAAAAAA Micdoodlecore{} [Micdoodle8 Core] (minecraft.jar)
UCHIJAAAAAA TooManyItems{1.7.10} [TooManyItems] (minecraft.jar)
UCHIJAAAAAA <CoFH ASM>{000} [CoFH ASM] (minecraft.jar)
UCHIJAAAAAA mod_ThreadedLighting{1.7.10-1.0} [Threaded Lighting] (minecraft.jar)
UCHIJAAAAAA gilded-games-util{1.7.10-1.1} [Gilded Games Utility] (gilded-games-util.jar)
UCHIJAAAAAA aether{Alpha 1.7.10-1.4} [Aether II] (aether.jar)
UCHIJAAAAAA appliedenergistics2{rv2-stable-10} [Applied Energistics 2] (appliedenergistics2-rv2-stable-10.jar)
UCHIJAAAAAA BiblioCraft{1.11.0} [BiblioCraft] (BiblioCraft[v1.11.0][MC1.7.10].jar)
UCHIJAAAAAA CoFHCore{1.7.10R3.0.3} [CoFH Core] (CoFHCore-[1.7.10]3.0.3-303.jar)
UCHIJAAAAAA BigReactors{0.4.3A} [Big Reactors] (BigReactors-0.4.3A.jar)
UCHIJAAAAAA Mantle{1.7.10-0.3.2.jenkins184} [Mantle] (Mantle-1.7.10-0.3.2.jar)
UCHIJAAAAAA Natura{2.2.0} [Natura] (natura-1.7.10-2.2.0.1.jar)
UCHIJAAAAAA BiomesOPlenty{2.1.0} [Biomes O' Plenty] (BiomesOPlenty-1.7.10-2.1.0.1394-universal.jar)
UCHIJAAAAAA Baubles{1.0.1.10} [Baubles] (Baubles-1.7.10-1.0.1.10.jar)
UCHIJAAAAAA Thaumcraft{4.2.3.5} [Thaumcraft] (Thaumcraft-1.7.10-4.2.3.5.jar)
UCHIJAAAAAA Botania{r1.7-221} [Botania] (Botania r1.7-221.jar)
UCHIJAAAAAA chocolateQuest{1.0} [Chocolate Quest] (chocolateQuest-1.7.10-1.0.jar)
UCHIJAAAAAA ComputerCraft{1.74} [ComputerCraft] (ComputerCraft1.74.jar)
UCHIJAAAAAA BuildMod{v1.0} [Build Mod] (coroutil-1.1.3 for MC v1.7.10.jar)
UCHIJAAAAAA CoroPets{v1.0} [CoroPets] (coroutil-1.1.3 for MC v1.7.10.jar)
UCHIJAAAAAA CoroAI{v1.0} [CoroAI] (coroutil-1.1.3 for MC v1.7.10.jar)
UCHIJAAAAAA ExtendedRenderer{v1.0} [Extended Renderer] (coroutil-1.1.3 for MC v1.7.10.jar)
UCHIJAAAAAA ConfigMod{v1.0} [Extended Mod Config] (coroutil-1.1.3 for MC v1.7.10.jar)
UCHIJAAAAAA craftguide{1.6.8.2} [CraftGuide] (CraftGuide-1.6.8.2-forge.jar)
UCHIJAAAAAA DamageIndicatorsMod{3.2.0} [Damage Indicators] (Damage-Indicators-Mod-1.7.10.jar)
UCHIJAAAAAA DragonMounts{r41-1.7.10} [Dragon Mounts] (DragonMounts-r41-1.7.10.jar)
UCHIJAAAAAA MoCreatures{6.3.1} [DrZhark's Mo'Creatures Mod] (DrZharks MoCreatures Mod v6.3.1.zip)
UCHIJAAAAAA eplus{3.0.2-d} [Enchanting Plus] (EnchantingPlus-1.7.10-3.0.2-d.jar)
UCHIJAAAAAA GalacticraftCore{3.0.12} [Galacticraft Core] (GalacticraftCore-1.7-3.0.12.357.jar)
UCHIJAAAAAA GalacticraftMars{3.0.12} [Galacticraft Planets] (Galacticraft-Planets-1.7-3.0.12.357.jar)
UCHIJAAAAAA godzillamod{1.6.6} [Godzilla Mod] (Godzilla Mod-1.7.10-1.6.6.jar)
UCHIJAAAAAA jcanimation{1.2.4} [JCAnimationAPI] (JurassiCraft-1.4.5.jar)
UCHIJAAAAAA llibrary{0.3.4-1.7.10} [LLibrary] (LLibrary-0.3.4-1.7.10.jar)
UCHIJAAAAAA jurassicraft{1.4.5} [JurassiCraft] (JurassiCraft-1.4.5.jar)
UCHIJAAAAAA MineFactoryReloaded{1.7.10R2.8.0} [MineFactory Reloaded] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatAppliedEnergistics{1.7.10R2.8.0} [MFR Compat: Applied Energistics] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatAtum{1.7.10R2.8.0} [MFR Compat: Atum] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatBackTools{1.7.10R2.8.0} [MFR Compat: BackTools] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatBuildCraft{1.7.10R2.8.0} [MFR Compat: BuildCraft] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatChococraft{1.7.10R2.8.0} [MFR Compat: Chococraft] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatExtraBiomes{1.7.10R2.8.0} [MFR Compat: ExtraBiomes] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatForestry{1.7.10R2.8.0} [MFR Compat: Forestry] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatForgeMicroblock{1.7.10R2.8.0} [MFR Compat: ForgeMicroblock] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatIC2{1.7.10R2.8.0} [MFR Compat: IC2] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA Mystcraft{0.11.0.00} [Mystcraft] (mystcraft-1.7.10-0.11.0.00.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatMystcraft{1.7.10R2.8.0} [MFR Compat: Mystcraft] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatProjRed{1.7.10R2.8.0} [MFR Compat ProjectRed] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatRailcraft{1.7.10R2.8.0} [MFR Compat: Railcraft] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatSufficientBiomes{1.7.10R2.8.0} [MFR Compat: Sufficient Biomes] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatThaumcraft{1.7.10R2.8.0} [MFR Compat: Thaumcraft] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatThermalExpansion{1.7.10R2.8.0} [MFR Compat: Thermal Expansion] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatTConstruct{1.7.10R2.8.0} [MFR Compat: Tinkers' Construct] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA TwilightForest{2.3.7} [The Twilight Forest] (twilightforest-1.7.10-2.3.7.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatTwilightForest{1.7.10R2.8.0} [MFR Compat: TwilightForest] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA MineFactoryReloaded|CompatVanilla{1.7.10R2.8.0} [MFR Compat: Vanilla] (MineFactoryReloaded-[1.7.10]2.8.0-104.jar)
UCHIJAAAAAA ParticleMan{v1.0} [Particle Man] (ParticleMan-1.4.1.jar)
UCHIJAAAAAA PneumaticCraft{1.2.6} [PneumaticCraft] (PneumaticCraft-1.2.6.jar)
UCHIJAAAAAA ReiMinimap{1.7.10} [Rei's Minimap] (Reis-Minimap-Mod-1.7.10.jar)
UCHIJAAAAAA ThermalFoundation{1.7.10R1.2.0} [Thermal Foundation] (ThermalFoundation-[1.7.10]1.2.0-102.jar)
UCHIJAAAAAA weather2{v2.3.9} [Localized Weather & Storms] (weather2-2.3.9 for MC v1.7.10.jar)
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
AE2 Version: stable rv2-stable-10 for Forge 10.13.2.1291
CoFHCore: -[1.7.10]3.0.3-303
Mantle Environment: Environment healthy.
MineFactoryReloaded: -[1.7.10]2.8.0-104
ThermalFoundation: -[1.7.10]1.2.0-102
AE2 Integration: IC2:OFF, RotaryCraft:OFF, RC:OFF, BC:OFF, RF:ON, RFItem:ON, MFR:ON, DSU:ON, FZ:OFF, FMP:OFF, RB:OFF, CLApi:OFF, Waila:OFF, InvTweaks:OFF, NEI:OFF, CraftGuide:ON, Mekanism:OFF, ImmibisMicroblocks:OFF, BetterStorage:OFF
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [GCEntityPlayerMP['AFosto'/131, l='SurvivalCraft test', x=-158.61, y=68.00, z=225.91]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

==================================================================================================

Thanks in Advance!

If this helps im operating on a Windows 7, and here is the mods I have downloaded:

Aether 2

Applied Energistics2

BiblioCraft

BigReactors

BiomesOPlenty

Botania

Chocolate Quest

CoFH Core

Computer Craft

CoroUtil

CraftGuide

Damage Indicators

Dragon Mounts

Dr Zharks Mo Creatures

Enchanting Plus

Galactic Craft Core

Galactic Craft Planets

Gilded Games Util

Godzilla Mod

JurassiCraft

LLibrary

Mantle

MicDoodle Core

Minefactory Reloaded

Mystcraft

Natura

Particleman

Pnuematic Craft

Reis Minimap

Thaumcraft

Thermal Foundation

TooManyItems

Twilight Forest

Weather 2

Oh, and if anyone has any other questions about the crash report/post just ask.

Lol, thank you I truthfully didn't look at the report since it kept happening and I think I had a different problem earlier since i don't thin craft guide was even downloaded for some of those crashes... and Iwill next time.